Module 2 Lesson 25

Module 2 Lesson 25

Use basic facts to approximate decimal quotients with two-digit divisors, reasoning about the placement of the decimal point.

• 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 use basic facts to approximate decimal quotients with two-digit divisors, reasoning about the placement of the decimal point.

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10 tenths

Write the number

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90 tenths

Write the number

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94 tenths

Write the number

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100 tenths

Write the number

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700 tenths

Write the number

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783 tenths

Write the number

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372 tenths

Write the number

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9 hundredths

Write the number

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10 hundredths

Write the number

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90 hundredths

Write the number

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98 hundredths

Write the number

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100 hundredths

Write the number

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900 hundredths

Write the number

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980 hundredths

Write the number

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1,000 hundredths

Write the number

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7,000 hundredths

Write the number

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7,400 hundredths

Write the number

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7,418 hundredths

Write the number

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4,835 hundredths

Write the number

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Write the division sentence and quotient

Thousand Hundred Ten One TenthHundredt

hThousand

th

380 ÷ 10

3 8 0

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When dividing by 10, digits shift howmany places to the right?


hThousand

th

380 ÷ 10

3 8 0

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hThousand

th

38 ÷ 10

3 8

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hThousand

th

3.8 ÷ 10

3 8

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hThousand

th

270 ÷ 10

2 7 0

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hThousand

th

2.7 ÷ 10

2 7

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hThousand

th

4,900 ÷ 10

4 9 0 0

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hThousand

th

49 ÷ 10

4 9

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hThousand

th

0.49 ÷ 10

4 9

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1.2 ÷ 4 =

Solve the division problem expressingthe whole in tenths

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1.2 ÷ 4 = 0.3

Write as a three step divisiontaking out the ten

1.2 ÷ 40 =

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1.2 ÷ 4 = 0.3


1.2 ÷ 40 =

1.2 ÷ 40 = 1.2 ÷ 10 ÷ 4 = 0.12 ÷ 4 = 0.03

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2.4 ÷ 2 =


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2.4 ÷ 2 =


2.4 ÷ 20 =

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8 ÷ 2 =


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8 ÷ 2 =


8 ÷ 20 =

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0.35 ÷ 5 =

Solve the division problem expressingthe whole in hundredths

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0.35 ÷ 5 =


0.35 ÷ 50 =

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Ms. Heinz spent 12 dollars on 30 bus tokens for the field trip. What was the cost of 12 tokens?

Learn

Problem 1

39.1 ÷ 17

Round the divisor first

Learn

Problem 1

39.1 ÷ 17

Round the the whole to somethingcan easily be divided by 20

____ ÷ 20 ≈

Learn

Problem 1

3.91 ÷ 17

Can you think of a multiple of 2

____ ÷ 20 ≈

Learn

Problem 1

3.91 ÷ 17

Can you think of a multiple of 2

____ ÷ 20 ≈

4 ÷ 20 = 4 ÷ 10 ÷ 2 = 0.4 ÷ 2 = 0.2.

4 ÷ 2 = 2 and 2 ÷ 10 = 0.2.

Learn

Problem 1

3.91 ÷ 17 ≈4 ÷ 20 =0.4 ÷ 2 =

0.2

39.1 ÷ 17 ≈40 ÷ 20 =

4 ÷ 2 =2

Learn

Problem 2

63.6 pounds of rice were put into73 bags. About how many pounds

of rice were in each bag?

Learn

Problem 2

63.6 ÷ 73

63.6 pounds of rice were put into73 bags. About how many pounds

of rice were in each bag?

Learn

Problem 2

63.6 ÷ 73 ≈____ ÷ 70

We can estimate the divisor to be 70because 63 in the whole is a

multiple of 7

Learn

Problem 2

6.36 ÷ 73 ≈

Learn

Problem 3

11.72 ÷ 42

Estimate the divisor

Learn

Problem 3

11.72 ÷ 42

What multiple of 4 is close to 11.72?

Practice

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Learning Targets

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Module 2 Lesson 25