Basic Multiplication
Adding Decimals
Subtracting Decimals
Which is Bigger?
Big Multiplication
100

3 x 5

15

100

1.1 + 2.3

3.4

100

1.0- 0.3

0.7

100

15,321 OR 15,231

15,321

100

30 x 10

300

200

6 x 2

12

200

3.1 + 4.2

7.3

200

2.5-0.4

2.1

200

15.2 OR 15.6

15.6

200

45 x 100

4,500

300

5 x 6

30

300

3.06 + .03

3.09

300

3.18-0.03

3.15

300

21.63 OR 22.6

22.6

300

30 x 40

1,200

400

9 x 9

81

400

1.08 + 0.2

1.28

400

3.11-0.08

3.03

400

4.15 OR 4.2

4.2

400

60 x 400

24,000

500

8 x 7

56

500

0.9 + 2.2

3.1

500

2.15-1.3

0.75

500

3.19 OR 3.9

3.9

500

800 x 600

480,000