Chapter 4 Review - Rational Numbers

**To change fractions to decimals, divide with the BOTTOMS OUT.**

Write 4/10 as a decimal

• 0.04

• 0.4

• 4.0

• 0.410

Write 9/100 as a decimal

• 0.09

• 0.9

• 0.91

• 9.1

Write 3/8 as a decimal.

• 0.38

• 0.375

• 2.33333...

• 8.3

**The number of decimal places used tells you the number of zeros in the denominator.**

Write 0.27 as a fraction

• 2/7

• 2 7/10

• 27/100

• 2 7/100

**Negatives are always smaller than positives.**

Fill in the blank with the correct sign >, < , or =

-1.8 _ 0.8

• >
• <
• =

**Compare one place value at a time and remember things in "negative world" is the opposite of "positive world".

Fill in the blank with the correct sign >, < , or =

-3.4  _ -2.5

• >
• <
• =

To add fractions with a common denominator, ADD the numerators and KEEP the denominator.

• 5/14
• 3/7
• 5/7
• 5/14

Add the numerators & keep the denominator. Pay attention to the signs.

-½ + -½

Simplify your answer.

• - ¼
• 1
• 0
• -1

**Keep the denominator. When you add the numerators, you will do -5 + 3.**

-5/8 + 3/8

Simplify.

• 1
• 8/8
• -2/8
• -1/4

**Get a common denominator first. Remember if you change the bottom, you have to change the top by multiplying by the same number.**

1/5 + 7/10

• 9/10

• 8/15

• 10/12

• 8/10