Main Idea and New 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

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

• terminating decimal

• repeating decimal

• bar notation

Use Mental Math

Write as a decimal.

Think

× 10

× 10

Answer:

A. 0.20

B. 0.25

C. 0.40

D. 1.20

Write as a decimal.__15

Use Mental Math

Write 7 as a decimal.__35

= 7 + 0.60 You know that

= 7.60 Add mentally.

Answer:

A. 2.1

B. 2.0

C. 1.2

D. 0.2

Write 1 as a decimal.__210

Use Division

Divide 1 by 8.

Write as a decimal. __18

– 820

– 1640

– 400

0.125

Answer:

A. 6

B. 1.6

C. 0.6

D. 0.06

Write as a decimal.__35

Use Division

Write – as a decimal.__125

Divide 1 by –25.– 1 00

0

–0.04

Answer:

Write – as a decimal.__38

A. –0.5

B. –0.375

C. –2.6

D. 0.375

Write Fractions as Repeating Decimals

Write as a decimal.

Divide 1 by 11.– 99

10– 0100– 99

10

0.090

– 010

90

Write Fractions as Repeating Decimals

Answer:

Write as a decimal.

A.

B. 0.3

C. 1.3

D.

CEREAL Jorge read that 0.72 of his favorite cereal was whole-grain wheat. Find what fraction of his cereal is whole-grain wheat. Write in simplest form.

The final digit, 2, is in the hundredths place.

Simplify.

Answer: So, of the cereal is whole-grain wheat.

LOTION Julianne’s lotion bottle indicated that 0.26 of the lotion is aloe vera. Find what fraction of the lotion is aloe vera. Write in simplest form.

A.

B.

C.

D.