10s
What is 10 more than 88?
98
What is 68 + 10?
78
What is 31 + 12?
43
What is 43 - 11?
32
What is 31 + 9?
40
What is 10 less than 42?
32
What is 56 + 20?
76
What is 30 + 12?
42
What is 88 - 12?
76
What is 75 - 6?
69
What is 2 tens more than 39?
59
What is 75 - 20?
55
What is 80 + 11?
91
What is 94 - 11?
83
What is 41 + 19?
60
Start at 78 and count up by 10s.
78, 88, 98, 108, 118
What is 84 plus 3 tens?
114
What is 88 + 12?
100
What is 42 - 21?
21
79
Start at 106 and count backward by 10s.
106, 96, 86, 76, 66, 56, 46
What 20 less than 33?
13
What is 91 + 11?
102
What is 54 - 31?
23
What is 88 - 19?
69