We are learning how to add and subtract 10's
(using a hundreds board and then in my head)
60 +30=90
36 +40 76
45 + 50 = 95
15 + 60 = 75
12 + 80 =92
75 +10 = 85
75 + 20 = 95
59 + 70 = 129
50 + _50__ = 100
82 - 30= 52
96 - 20 = 76
84 - 30 =54
67 - 10=57
95 - 40 = 55
71 - 60 = 11
55 - 10 = 45
47 - 20 = 27
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