module 2 lesson 10 multiply decimal fractions with tenths by multi-digit whole numbers using place...

Module 2 Lesson 10

Multiply decimal fractions with tenths by multi-digit whole numbers using place value

understanding to record partial products.

• 5.NBT.7 Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

Common CoreStandards

Learning Targets

•I can multiply decimal fractions with tenths by multi-digit whole numbers using place value understanding to record partial products.

Activate Knowledge

3 × 2 is?

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3 × 2 x 10 ÷ 10 is?

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5 × 0.3 is?

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5 × 0.3 x 10 ÷ 10 is?

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3 × 2.5 is?

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3 × 2.5 x 10 ÷ 10 is?

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2 × 3.4 is?

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2 × 3.4 x 10 ÷ 10 is?

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Why are the products the same when we multiply by 10 and then divide by 10?

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Write the word name

7.463

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Represent this number in a two-part number bond with ones as one part and thousandths as the other part

7.463

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Represent it again with tenths and thousandths.

7.463

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Represent it again with hundredths and thousandths.

7.463

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Write the word name

8.972

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Represent this number in a two-part number bond with ones as one part and thousandths as the other part

8.972

Activate Knowledge

Represent it again with tenths and thousandths.

8.972

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Represent it again with hundredths and thousandths.

8.972

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Write the word name

6.849

Activate Knowledge

Represent this number in a two-part number bond with ones as one part and thousandths as the other part

6.849

Activate Knowledge

Represent it again with tenths and thousandths.

6.849

Activate Knowledge

Represent it again with hundredths and thousandths.

6.849

Activate Knowledge

The fifth-grade craft club is making aprons to sell.

Each apron takes 1.25 yards of fabric that costs $3

per yard and 4.5 yards of trim that costs $2 per

yard. What does it cost the club to make one apron?

If the club wants to make $1.75 profit on each

apron, how much should they charge per apron?

Learn

Problem 1

43 × 2.4

Round the factors to estimate the product.

Learn

Problem 1

43 × 2.4

Predict whether our estimate is greater than or less than the actual product.

Learn

Problem 1

43 × 2.4

There are 43 units of 2.4. How many tenths is 2.4?

Learn

Problem 1

43 × 24 tenths

Solve using the standard algorithm

Learn

Problem 1

2.4×43

x 10 24×43

72960

1032÷ 10

103.2

Tenths

Learn

Problem 1

3.5 × 42

Round the factors to estimate the product.

Learn

Problem 1

3.5 × 42

Predict whether our estimate is greater than or less than the actual product.

Learn

Problem 1

3.5 × 42

There are 43 units of 2.4. How many tenths is 2.4?

Learn

Problem 1

35 tenths x 42

Solve using the standard algorithm

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Problem 1

15.6 × 73

Round the factors to estimate the product.

Learn

Problem 1

15.6 × 73

Predict whether our estimate is greater than or less than the actual product.

Learn

Problem 1

15.6 × 73

There are 43 units of 2.4. How many tenths is 2.4?

Learn

Problem 1

156 tenths x 73

Solve using the standard algorithm

Practice

Review