Adding & Subtracting Rational Numbers

Adding Fractions

1

-5 1/3 + 8 2/3

What is 3 1/3

2

4 5/6 + (-1 2/3)

What is 3 1/6

3

-18 7/9 + 7 4/9

What is -11 1/3

4

3 1/4 + 7 3/4

What is 11

5

-12 7/8 + -2 1/2

What is - 15 3/8

Subtracting Fractions

1

-8 1/2 - 4

What is -12 1/2

2

7 3/8 - (-2 1/8)

What is 9 1/2

3

-26 2/5 - ( -11 1/5)

What is -15 1/5

4

14 1/7 - ( -3 3/14)

17 5/14

5

-5 3/6 - ( -10 2/3)

What is 5 1/6

Adding Decimals

1

-13.4 + 8.6

What is -4.8

2

7.51 + 22.08

What is 29.59

3

-41.90 + 22

What is -19.90

4

117.4 + 8.93

126.33

5

- 328.17 + 63.40

What is -264.77

Subtracting Decimals

1

-3.7 - 14.9

What is -18.6

2

22.43 - 4.07

What is 18.36

3

-81.36 - 41.93

What is -123.29

4

7.85 - ( -31.03)

What is 38.88

5

206.14 - 131.78

What is 74.36

Math Rules

1

What has to be done before you can add and subtract fractions? 

What is find a common denominator

2

What must be done in order to add decimals? 

What is line up the decimal (and place values)

3

When you add two numbers with different signs, how do you know if the answer is positive or negative?

What is the answer will have the same sign as the larger number (as an absolute value)

4

Explain how you change a subtraction problem to an addition problem? 

What is ADD THE OPPOSITE?

5

Part 1 - If you are adding two numbers with the same sign, what do you do?  

Part 2 - When you add two negative numbers, what will the sign be for the answer?

Part 1 - Find the Sum

Part 2 - Negative