Adding and Subtracting Rational Numbers Review

Rational Numbers Operations Review

Multiple Choice

Select the whole number.

• 15

• 2.4

• -10

• $$\frac{1}{4}$$

Multiple Select

Which of the following are rational numbers?

• 16

• 1.4

• - $$\frac{3}{4}$$

• -12

Multiple Choice

Simplify (solve) -5 + 2

• -7

• -3

• 3

• 7

Multiple Choice

10 + (-2)

• -8

• -12

• 8

• 12

Multiple Choice

-25 - 15

• -40

• 40

• 10

• -

Rational Numbers

Addition & Subtraction

The rules for adding and subtracting rational numbers are the same as the rules for adding and subtracting integers.

Multiple Choice

45. 75 + 18.124

• 22.699

• 226.99

• 63.874

• 27.626

​	Like Denominators​	Unlike Denominators​
​Addition	​1) Add the numerators 2)Keep the denominators the same 3) Simplify the fraction	​1) Find the least common denominator 2) Rewrite the fractions with the common denominator 3) Add the numerators 4) Keep the denominator the same 5) Simplify
​Subtraction	​1) Subtract the denominators 2) Keep the denominators the same 3) Simplify the fraction	​1) Find the least common denominator 2) Rewrite the fractions with the common denominator 3) Subtract the numerators 4) Keep the denominator the same 5) Simplify

Put it all together

Add & Subtract Rational Numbers

Rational Numbers include fractions and decimals.
Use the following rules to add & subtract with rational numbers:

Rules for adding & subtracting integers
Rules for adding & subtracting decimals
Rules for adding & subtracting fractions

Multiple Choice

-45.15 + (-32.12)

• 77.27

• -77.27

• 13.03

• -13.03

Multiple Choice

$92.34 + $10.04

• $102.38

• -$102.38

• $82.30

• -$82.30

Multiple Choice

$$\frac{3}{7}\ +\ \frac{1}{7}$$

•  $$\frac{2}{7}$$

• $$\frac{4}{14}$$

• $$\frac{4}{7}$$

•  $$\frac{2}{14}$$

Multiple Choice

$$-\frac{4}{13}-\left(-\frac{5}{13}\right)$$

• $$\frac{1}{13}$$

• $$-\frac{1}{13}$$

• $$\frac{9}{13}$$

• $$-\frac{9}{13}$$