🔢 Math · Grade 5

Read this aloud (it is the lesson's hook). Students think, then tell a partner what they notice.

“Parentheses tell you what to do first.”

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3. Press Next to the Movie step and press ▶ Play.

The video says:

• Parentheses first: 3 plus 5 is 8. Then 8 times 2 is 16.
• Without parentheses, multiply first: 5 times 2 is 10, then 3 plus 10 is 13.
• Inside out: parentheses, then brackets. 3 times 4 is 12, plus 2 is 14.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

Read this question aloud. Students write the answer on a slip of paper with no name or with a class number, and hand it in.

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““Add 8 and 7, then multiply by 2” can be written as (8 + 7) × 2.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• Add 8 and 7, then multiply by 2: write (8 + 7) × 2.
• Two copies of 8 plus 7: the value is 30.
• 3 × (18 + 932) is 3 times as large as 18 + 932.
• You can compare without finding the answer!

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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If time is left, students play the lesson's game steps (they show up between the videos and Check).

Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

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“Multiply by 10 and every digit moves one place left.”

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2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• Times ten: every digit shifts one place left. 3.45 times 10 is 34.5.
• Times a hundred: two places. 3.45 times 100 is 345.
• Ten to the third is one thousand: 10 × 10 × 10, three zeros.
• Each place is 10 times the place to its right: 0.4 is 10 times 0.04.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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If time is left, students play the lesson's game steps (they show up between the videos and Check).

Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

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“Race times like 12.357 seconds use thousandths.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• 3.452: three and four hundred fifty-two thousandths.
• Expanded form shows each place: 3 + 0.4 + 0.05 + 0.002.
• Compare place by place: 0.457 has 7 thousandths and 0.45 has 0. So 0.457 is greater.
• Round 3.476 to the hundredths: 6 thousandths rounds up to 3.48.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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If time is left, students play the lesson's game steps (they show up between the videos and Check).

Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

Read this question aloud. Students write the answer on a slip of paper with no name or with a class number, and hand it in.

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“A theater has 15 sections with 234 seats in each. Multiply to find the total.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• 234 seats times 15 sections: break it into place-value parts.
• 234 times 10 is 2,340, and 234 times 5 is 1,170.
• Add the partial products: 3,510 seats.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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If time is left, students play the lesson's game steps (they show up between the videos and Check).

Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

Read this question aloud. Students write the answer on a slip of paper with no name or with a class number, and hand it in.

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“672 stickers go into 21 equal packs.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• Estimate: 600 divided by 20 is 30.
• 672 divided by 21: 21 × 30 is 630, and 21 × 2 is 42. That makes 32.
• Check with multiplication: 21 times 32 is 672.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

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“Money is decimals: $4.75 + $2.50. Line up the points.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• Line up the decimal points: 4.75 plus 2.50 is 7.25.
• Add a zero placeholder so the places match: 6.4 is 6.40.
• Then subtract place by place: 6.40 minus 2.75 is 3.65.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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If time is left, students play the lesson's game steps (they show up between the videos and Check).

Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

Read this question aloud. Students write the answer on a slip of paper with no name or with a class number, and hand it in.

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“3 notebooks cost $1.25 each. What is the total?”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model. This lesson has 2 3D videos in a row: press Next and ▶ Play for each part.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• One notebook costs $1.25: one whole and 25 hundredths.
• Three notebooks: 3 times 1.25 is $3.75.
• 0.3 times 0.4: 3 columns and 4 rows overlap in 12 hundredths. 0.12.
• How many 0.6s fit in 4.8? Eight.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

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“½ + ⅓: different-size pieces. Rename to the same size first.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model. This lesson has 2 3D videos in a row: press Next and ▶ Play for each part.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• One half plus one third: different-size pieces. Rename as sixths.
• 3/6 plus 2/6 is 5/6.
• Mixed numbers: 2 1/2 minus 1 3/4 is 2 2/4 minus 1 3/4. Regroup: 3/4.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

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Read this aloud (it is the lesson's hook). Students think, then tell a partner what they notice.

“Lia walked ½ mile, then ⅓ mile. More or less than 1 mile?”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• Lia walks 1/2 mile, then 1/3 mile. Common denominator 6: 3/6 plus 2/6 is 5/6 mile.
• 5/6 is less than a whole mile: that makes sense.
• Is 2/5 plus 1/2 equal to 3/7? 3/7 is less than 1/2 alone, so it cannot be right.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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If time is left, students play the lesson's game steps (they show up between the videos and Check).

Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

Read this question aloud. Students write the answer on a slip of paper with no name or with a class number, and hand it in.

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“3 pizzas shared equally by 4 friends: each gets ¾ of a pizza.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model. This lesson has 2 3D videos in a row: press Next and ▶ Play for each part.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• Three pizzas shared equally by four friends.
• Each friend gets three fourths: 3 divided by 4 is 3/4.
• Seven divided by two is 7/2: three and one half.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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If time is left, students play the lesson's game steps (they show up between the videos and Check).

Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

Read this question aloud. Students write the answer on a slip of paper with no name or with a class number, and hand it in.

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“½ of ⅔ of a pan of brownies: multiply.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model. This lesson has 2 3D videos in a row: press Next and ▶ Play for each part.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• 1/2 of 2/3: shade 2/3 one way and 1/2 the other way. The overlap is 2/6 = 1/3.
• Fraction side lengths: 1/2 foot by 3/4 foot is 3/8 square foot.
• Three fourths of 8 is 6.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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If time is left, students play the lesson's game steps (they show up between the videos and Check).

Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

Read this question aloud. Students write the answer on a slip of paper with no name or with a class number, and hand it in.

Read this aloud (it is the lesson's hook). Students think, then tell a partner what they notice.

“A photo printed ½ as big, or 1½ times as big: which is larger?”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• 8 times 1 1/2: times more than 1, so the answer, 12, is more than 8.
• 8 times 1/2: times less than 1, so the answer, 4, is less than 8.
• 8 times exactly 1: it stays 8.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

Read this question aloud. Students write the answer on a slip of paper with no name or with a class number, and hand it in.

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“A recipe needs ¾ cup of sugar. You make 2½ batches.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model. This lesson has 2 3D videos in a row: press Next and ▶ Play for each part.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• A recipe needs 3/4 cup. You make 2 1/2 batches: 5/2 times 3/4.
• Change to improper fractions and multiply: 15/8.
• 15/8 is one and seven eighths cups of sugar.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

Try it together first:

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If time is left, students play the lesson's game steps (they show up between the videos and Check).

Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

Read this question aloud. Students write the answer on a slip of paper with no name or with a class number, and hand it in.

Read this aloud (it is the lesson's hook). Students think, then tell a partner what they notice.

“How many ¼-cup scoops in 3 cups? Divide 3 by ¼.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model. This lesson has 2 3D videos in a row: press Next and ▶ Play for each part.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• How many 1/4-cup scoops in 3 cups? Each cup holds 4; 3 cups hold 12.
• 1/3 divided by 2: split one third into 2 parts. Each is 1/6.
• Multiply to check: 12 times 1/4 is 3.

Students open the same lesson on their own device (or work with the board). Press Next to Try it.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

Read this question aloud. Students write the answer on a slip of paper with no name or with a class number, and hand it in.

Read this aloud (it is the lesson's hook). Students think, then tell a partner what they notice.

“A table is 2.5 m long. How many centimeters is that?”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• Meters to centimeters: multiply by 100. 2.5 meters is 250 centimeters.
• Grams to kilograms: divide by 1,000. 4,500 grams is 4.5 kilograms.
• Thirty inches is two and a half feet.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

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“Five beakers hold different amounts of water. If we share it equally, how much is in each?”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• Five beakers of water, in liters.
• On a line plot: X's at 1/4, 1/2, 1/2, 3/4 and 1.
• Add them: 3 liters. Shared equally: 3/5 of a liter each.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

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Read this aloud (it is the lesson's hook). Students think, then tell a partner what they notice.

“Fill a box with unit cubes: that's volume.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model. This lesson has 2 3D videos in a row: press Next and ▶ Play for each part.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• A unit cube is 1 unit on every edge: 1 cubic unit.
• One layer: 4 by 3 is 12 cubes.
• Two layers: 24 cubic units.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

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“A shed is shaped like two boxes joined together.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model. This lesson has 2 3D videos in a row: press Next and ▶ Play for each part.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• Volume: length times width times height. 5 times 4 times 3 is 60.
• Or base area times height: B is 20, times 3 is 60.
• A shed of two joined boxes: add their volumes. 24 plus 10 is 34.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

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“A treasure map grid: (3, 5) means 3 right, then 5 up.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• A treasure map: (3, 5). x first, then y: over 3, up 5.
• The origin is where the axes meet: (0, 0).
• School (2, 3) and park (2, 8): same x, just count up 5.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

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“Rule A: add 3. Rule B: add 6. Pair them up and graph them.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• Rule A: start at 0, add 3. Rule B: start at 0, add 6.
• Pair them up: (0, 0), (3, 6), (6, 12), (9, 18).
• Plot and compare: B is always twice A.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

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“A square is a rectangle and a rhombus. Shapes belong to families.”

1. Open the lesson link on the board.
2. Press Next to the 🎬 Watch in 3D step and press ▶ Play. Students can drag to turn the model.
3. Press Next to the Movie step and press ▶ Play.

The video says:

• Quadrilaterals have four sides.
• Parallelograms: two pairs of parallel sides.
• A square fits both families: it is a rectangle and a rhombus.

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Students press Next to Check and answer the 4 questions on their own device. Goal: 100%. 95% or more is Mastered. “Not yet” means try again; students may retry.

Read this question aloud. Students write the answer on a slip of paper with no name or with a class number, and hand it in.