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01/05/10 Divide Decimals #5PowerPoint Presentation

01/05/10 Divide Decimals #5

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LT: I will divide decimals.

- Warm Up:
- 5×6
- 1×6
- 4×6

- 9×6
- 6×10
- 6×8

- 6×2
- 6×3
- 7×6

- 6×6
- 6×100
- 6×11

Today’s Plan:

-Multiplication Practice

-Correct Homework

-Divide Decimals

Learning Target:

-I will divide decimals.

LT: I will divide decimals.

Timed Test 1-5

Today’s Plan:

-Multiplication Practice

-Correct Homework

-Divide Decimals

Learning Target:

-I will divide decimals.

LT: I will divide decimals.

Correct Homework

Today’s Plan:

-Multiplication Practice

-Correct Homework

-Divide Decimals

Learning Target:

-I will divide decimals.

Dividing Decimals by Integers

7

36.75

Course 2

Additional Example 1A: Dividing Decimals by Integers

Divide. Estimate to check whether the answer is reasonable.

A. 36.75 ÷ 7

.

5

2

5

)

Place the decimal point for the answer

directly above the decimal under the

division symbol.

–35

1

7

–14

Divide as with whole numbers.

3

5

–3 5

0

Estimate

5.25 is a reasonable answer.

35 ÷ 7 = 5

Dividing Decimals by Integers

3

0.87

Course 2

Additional Example 1B: Dividing Decimals by Integers

Divide. Estimate to check whether the answer is reasonable.

B. 0.87 ÷ 3

Place the decimal point for the answer

directly above the decimal under the

division symbol.

.

9

2

0

)

–6

27

–27

Divide as with whole numbers.

0

Estimate

0.9 ÷ 3 = 0.3

0.29 is a reasonable answer.

Dividing Decimals by Integers

Remember!

When you divide two numbers with different signs, the answer is negative.

Course 2

Dividing Decimals by Integers

Course 2

Additional Example 1C: Dividing Decimals by Integers

Divide. Estimate to check whether the answer is reasonable.

C. 82.08 ÷ (–27)

.

3

0

4

)

The signs are different.

27

82.08

–81

Think: 82.08 ÷ 27.

1

0

–0

Place the decimal point for the answer

directly above the decimal under the

division symbol.

1

08

–108

0

82.08 ÷ (–27) = –3.04

Estimate

90 ÷ –30 = –3

The answer is reasonable.

Dividing Decimals by Integers

4

39.16

Course 2

Insert Lesson Title Here

Try This: Example 1A

Divide. Estimate to check whether the answer is reasonable.

A. 39.16 ÷ 4

9

.

7

9

)

Place the decimal point for the answer

directly above the decimal under the

division symbol.

–36

3

1

–28

Divide as with whole numbers.

3

6

–3 6

0

Estimate

9.79 is a reasonable answer.

40 ÷ 4 = 10

Dividing Decimals by Integers

4

0.56

Course 2

Insert Lesson Title Here

Try This: Example 1B

Divide. Estimate to check whether the answer is reasonable.

B. 0.56 ÷ 4

Place the decimal point for the answer

directly above the decimal under the

division symbol.

.

1

4

0

)

–4

16

–16

Divide as with whole numbers.

0

Estimate

0.6 ÷ 4 = 0.15

0.14 is a reasonable answer.

Dividing Decimals by Integers

Course 2

Insert Lesson Title Here

Try This: Example 1C

Divide. Estimate to check whether the answer is reasonable.

C. 65.16 ÷ (–12)

.

5

4

3

)

The signs are different.

12

65.16

–60

Think: 65.16 ÷ 12

5

1

–4 8

Place the decimal point for the answer

directly above the decimal under the

division symbol.

36

–36

0

65.16 ÷ (–12) = –5.43

Estimate

The answer is reasonable.

60 ÷ –12 = –5

- Assignment
- Page 208 #8-14

Today’s Plan:

-Multiplication Practice

-Correct Homework

-Divide Decimals

Learning Target:

-I will divide decimals.

Division Vocabulary

- The dividendis the number that is being divided.
- The divisoris the number that the dividend will be divided by.
- The quotient is the number of times the divisor will go into the dividend. (The answer to the division problem.)
dividend÷divisor= quotient or quotient

divisor )dividend

- In this example 5 is the divisor, 36 is the dividend, 7.2 is the quotient.

7.2

36 ÷5= 7.2

)

5

36.0

– 35

10

– 10

0

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