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Main Idea and New Vocabulary
NGSSS
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
Five-Minute Check
• Write fractions as terminating or repeating decimals and write decimals as fractions.
• terminating decimal
• repeating decimal
• bar notation
MA.7.A.5.1 Express rational numbers as terminating or repeating decimals.
Use Mental Math
Write 7 as a decimal.__35
= 7 + 0.60 You know that
= 7.60 Add mentally.
Answer:
Use Division
Divide 1 by 8.
Write as a decimal. __18
– 820
– 1640
– 400
0.125
Answer:
Use Division
Write – as a decimal.__125
Divide 1 by –25.– 1 00
0
–0.04
Answer:
Write Fractions as Repeating Decimals
Write as a decimal.
Divide 1 by 11.– 99
10– 0100– 99
10
0.090
– 010
90
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.
A. 2.6
B. 1.2
C. 0.6
D. 0.4
Write as a decimal. Use bar notation if the
decimal is a repeating decimal.
A. 1.6
B. 1.375
C. 0.625
D. 0.375
Write as a decimal. Use bar notation if the
decimal is a repeating decimal.
Write as a decimal. Use bar notation if the
decimal is a repeating decimal.
A. 9
B. 0.88
C. 0
D. 0
