Add it Up
what is 50 + 50 ?
100
85-18=
67
skip count by 10's
10, 20, 30, 40, 50
4 x 2
8
5 x 0
155 + 148=
303
31 - 19 =
12
skip count by 2's
2, 4, 6, 8, 10
4 x 4
16
5 x 1
5
407+352=
759
74-48=
26
Count by 5's
5, 10, 15, 20, 25
4 x 6
24
5 x 3
15
1234 +121=
1355
56 - 12 =
44
Count by 3's
3, 6, 9, 12, 15
4 x 8
32
5 x 4
20
1,790 + 1,590 =
3380
150 - 40 =
110
Count by 4's
4, 8, 12, 16, 20
4 x 9
36
5 x 5
25