Show:
Addition
Subtraction
Multiplication
Groups
Arrays
100

8 + 13 =

21

100

17 - 6 = 

11

100

4 x 5 =

20

100

3 groups of 2 = 

6

100

Draw an array for 2 x 2

4

200

21 + 12 =

33

200

43 - 25 =

18

200

3 x 3 =

9

200

4 groups of 4 = 

16

200

Draw an array for 2 x 4

8

300

53 + 24 =

77

300

78 - 56 = 

22

300

10 x 4 =

40

300

5 groups of 5 = 

25

300

Draw an array for 3 x 4

12

400

231 + 345 =

576

400

873 - 549 = 

324

400

7 x 6 =

42

400

6 groups of 3 = 

18

400

Draw an array for 4 x 6

24

500

3210 + 1439 = 

4649

500

5987 - 4358 = 

1629

500

9 x 8 =

72

500

9 groups of 4 = 

36

500

Draw an array for 6 x 5

30