Addition-Regrouping
55+17
72
10+51
61
26-7
19
28-10
18
Name 3 even numbers
2, 4, 6, 8, 10, 12, 14, 16......
38+38
76
11+21
32
48
33-22
11
Name 3 odd numbers
1,3,5,7,9,11
16+14
30
15+32
47
65-30
35
98-45
53
round 17 to the closest 10
10 or 20
20
27+24
51
32+32
64
67-9
58
89-16
73
round 22 to the closest 10
10 or 20
20
26+35
61
65+31
96
48-19
29
123-23
100
Round 56 to the closest 10
50 or 60
60