Add
Subtract
Multiply
Divide
100

The first step when adding decimals

Line up the decimal

100

The first step in subtracting decimals

Line up the decimals

100

The first step in multiplying decimals

Multiply

100

When dividing with a decimal in the divisor 

Move the decimal to make it a whole number

200

add 3.20+ 21.14+ 321.90

346.24

200

5.6-3.6

2 or 2.0

200

7.00 X 5

35.00

200

4.00 ÷ 2

2.00

300

3.145+0.20+15.9=

19.245

300

14.6-2.9=

11.7

300

4.21 X 7=

29.47

300

7.91 ÷ 7=

1.13

400

11.24+8.09

19.33

400

56.52-33.19=

23.33

400

4.89 X 16=

78.24

400

24.66 ÷ .6=

41.1

500

76.4+3.516 +3.140=

83.056

500

43.46-32.126=

11.334

500

46.92 x 17=

797.64

500

15.56 ÷ .04=

389.0