Adding & Subtracting Rational Numbers

Decimals

1. 2.304 ( 0.268)

AlignThe

DecimalPoints

2.304 0.268

Now follow your adding rules:Same sign, ADD

2.3040.268

Decimals

2. 8.007 ( 5.755)

AlignThe

DecimalPoints

8.007 5.755

Now follow your adding rules:Same sign, ADD

8.0075.755

Don’t forget to alignthe decimal points

•1st “FIX” your double signs.

•2nd Group all positives together and all negatives together.

3. 28.32 ( 56.17) 32.41 ( 75.13) 28.32 56.17 32.41 75.13 32.41 75.13

Same signsHere - ADD

Same SignsADD

131.3060.73

Don’t Forget

To AlignThe

DecimalPoints

•1st “FIX” your double signs.

•2nd Group all positives together and all negatives together.

4. 22.38 ( 72.16) 42.31 ( 57.08) 22.38 72.16 42.31 57.08 42.31 57.08

Same signsHere - ADD

Same SignsADD

129.2464.69

5 3 155.

8 4 16

Each

Fraction

must be

inside a set of parentheses.

13

16

uUse negNot subtraction

3 1 36.

5 2 8

(_ nghknbz3 / 5 )

+

(_1/2)

?+

(3/8)

EERJKDmee29

40

Each Fraction must be inside

a set of parentheses.

uUse negNot subtraction

uUse negNot subtraction

5 37.

9 5

(_5/9)

-

(_3/5)

RJKDmee

Each Fraction must be inside a set of parentheses.

2

45

uUse negNot subtraction

1 68.

2 7

(_1/2)

-

(_6/7)

RJKDmee

Each Fraction must be inside a set of parentheses.

uUse negNot subtraction

1 19. 4 6

4 3

Change each mixed number to an Improper Fraction!

Multi

Add

17

4 +

19

3

Multi

Add

(_17/4)

+

(19/3)

mee 12

12

2 310. 2 3

3 4

Change each mixed number to an Improper Fraction!

Multi

Add

8

3 +

-15

4

Multi

Add

(8/3)

+

(_15/4)

mee 11

12