Addition
8 + 13 =
21
17 - 6 =
11
4 x 5 =
20
3 groups of 2 =
6
Draw an array for 2 x 2
4
21 + 12 =
33
43 - 25 =
18
3 x 3 =
9
4 groups of 4 =
16
Draw an array for 2 x 4
8
53 + 24 =
77
78 - 56 =
22
10 x 4 =
40
5 groups of 5 =
25
Draw an array for 3 x 4
12
231 + 345 =
576
873 - 549 =
324
7 x 6 =
42
6 groups of 3 =
18
Draw an array for 4 x 6
24
3210 + 1439 =
4649
5987 - 4358 =
1629
9 x 8 =
72
9 groups of 4 =
36
Draw an array for 6 x 5
30