Add/Subtract Decimals
Multiply Decimals
Divide Decimals
Multiply Fractions
Divide Fractions
100

When adding or subtracting decimals, do you line up the numbers or the decimals? 

The decimals

100

When multiplying decimals, do you line up the numbers or the decimals? 

The numbers

100

Do we ever divide by a decimal? 

No! Change the divisor to a whole number.

100

5/6 x 9/10

3/4

100

9 ÷ 4/5

11 1/4

200

NO CALCULATOR:

Add 54.6 + 43.79

98.39

200

NO CALCULATOR: 

Multiply 2.37 x 1.2 

2.844

200

Whatever we do to the divisor, we must also to do the _____. 

Dividend

200

3 1/5 x 2/3 

2 2/15

200

5/14 ÷ 4/7 

5/8

300

NO CALCULATOR:

Subtract 89.74 - 62.8

26.94

300

NO CALCULATOR: 

Multiply 5.61 x 2.7

15.147

300

Divide 56 ÷ 5

11.2

300

5 1/3 x 3

16

300

3 5/6 ÷ 9 5/6

23/59

400

NO CALCULATOR:

Add 63.8 + 71.62

135.42

400

NO CALCULATOR: 

Multiply 36.4 x 4.2

152.88

400

Divide 2.45 ÷ 0.07

35

400

4 1/8 x 5 1/2

22 11/16

400

2 5/8 ÷ 13

21/104

500

NO CALCULATOR: 

Subtract 407.3 - 251.39

155.91

500

NO CALCULATOR: 

Multiply 5.4 x 4

21.6

500

Divide 8.9 ÷ 0.4

22.25

500

2 1/6 x 4 1/2

9 3/4

500

3 6/7 ÷ 6 3/4

4/7