Lesson 4.5 - Fractions And Decimals

Five-Minute Check (over Lesson 4–4) Main Idea and Vocabulary Example 1:Use Mental Math Example 2:Use Mental Math Example 3:Use Division Example 4:Use Division Example 5:Write Fractions as Repeating Decimals Example 6:Real-World Example: Use a Power of 10

• Write fractions as terminating or repeating decimals and write decimals as fractions.

• terminating decimals • repeating decimals • bar notation

Use Mental Math

×10 Think ×10

Answer: So,

.

B. 0.28

0% D

A B C 0% D C

0% B

A

0%

1. 2. 3. 4.

Use Mental Math

Write as a sum.

Add. Answer:

C. 9.2

0% D

A B C 0% D C

0% B

A

0%

1. 2. 3. 4.

Use Division

Method 1 Use paper and pencil. Divide 1 by 8.

Use Division Method 2 Use a calculator. 1 ÷

8

Answer:

ENTER =

0.125

D. 0.4

0% D

A B C 0% D C

0% B

A

0%

1. 2. 3. 4.

Use Division

Method 1 Use paper and pencil. 4

100 0 Answer: So,

= 0.04

Divide 1 by 25.

Use Division Method 2 Use a calculator. 1 ÷

25

Answer:

ENTER =

= 0.04

0.04

Write

as a decimal.

C. 1.35

0% D

A B C 0% D C

0% B

A

0%

1. 2. 3. 4.

Write Fractions as Repeating Decimals

Method 1 Use paper and pencil. Divide 1 by 11.

Write Fractions as Repeating Decimals Method 2 Use a calculator. 1 ÷

11

Answer:

ENTER =

0.090909

A. B. C. 0% D

A B C 0% D C

A

0% B

0%

D.

1. 2. 3. 4.

Use a Power of 10 CEREAL Jorge read that 0.72 of his favorite cereal was whole-grain wheat. Find what fraction of his cereal, in simplest form, is whole-grain wheat. The final digit, 2, is in the hundredths place. Simplify.

Answer: So,

of the cereal is whole-grain wheat.

EXERCISE Jeanette ran 0.86 of a mile. What fraction of a mile did she run?

0%

mi

0%

1. 2. 3. 4.

A B C 0% D

0% D

D.

mi

C

C.

mi

B

B.

mi

A

A.

End of the Lesson

Homework – Pg 199-200, # 14-36all, 49-57all

Five-Minute Check (over Lesson 4–4) Image Bank Math Tools

Percents Prime Factorization

(over Lesson 4-4)

A. B. C. 0% D

0%

A B C 0% D C

A

0%

B

D.

1. 2. 3. 4.

(over Lesson 4-4)

Write

in simplest form.

A. B. C. 0% D

0%

A B C 0% D C

A

0%

B

D.

1. 2. 3. 4.

(over Lesson 4-4)

A. B. C. 11 0% D

0%

A B C 0% D C

A

0%

B

D. 21

1. 2. 3. 4.

(over Lesson 4-4)

Write two fractions that are equivalent to A. B. C. 0% D

0%

A B C 0% D C

A

0%

B

D.

1. 2. 3. 4.

(over Lesson 4-4)

Write two fractions that are equivalent to A. B. C. 0% D

0%

A B C 0% D C

A

0%

B

D.

1. 2. 3. 4.

(over Lesson 4-4)

Which fraction is not equivalent to the other fractions? A. B.

0% D

0% B

D.

A

0%

A B C 0% D C

C.

1. 2. 3. 4.