Rules
Fractions 1
Decimals 1
Fractions 2
Decimals 2
100

When adding/subtracting fractions, what do you need your fractions to have?

Common denominators
100

Add 1/2 + 3/4 

5/4 or  1 1/4

100

Add the decimals: 1.46 + 1.21

2.67

100

-1/4 - 1/4 = ?

-2/4 or -1/2

100

-3.5 - 1.5 = ?

-5

200

When adding decimals, what's the most important step when solving?

Line up the decimals.

200

Add 1/2 + 1/4 

3/4

200

Add the decimals: 1.5 + 2.03 + 0.6

4.13

200

-3/4 - (-3/4) = ?

0

200

-1.75 + (-4.25) = ?

-6

300

When subtracting decimals, which number should be written on top?

The larger number
300

Subtract 7/10 - 1/5

1/2

300

Subtract 4.52 - 2.001

2.519

300

1/3 - (-2/3) = 

3/3 or 1

300

8 + (-9.8) = 

-1.8

400

When adding a negative plus a negative, what sign will my answer have?

Negative

400

Subtract 2 7/8 - 1 6/8  

1 1/8
400

Add the decimals: 24.6 + 2.01 + 16.98 =

43.59

400

2 3/4 - (-3) = 

5 3/4

400

-9.5 - 6.5 = ?

-16

500

Subtraction problems can be rewritten as what?

Adding the opposite

EX: -4-5 = -4 + (-5)

500

Add 1/3 + 2/6 + 3/5 

38/30 or 19/15 or 1 4/15

500

Subtract the decimals: 45.6 - 2.39

43.21

500

-7 1/8 - 6 3/8

-13 4/8 or -13 1/2

500

8.3 - (-8.3) = 

16.6

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