Mental Math
10 + 7 =
17
24 + 52 =
76
19 + 18 =
37
20 - 15 =
5
33 - 17 =
16
30 + 15 =
45
17 + 22 =
39
33 + 27 =
60
47 - 23 =
24
55 - 27 =
28
50 + 32 =
82
45 + 31 =
76
55 + 41 =
96
66 - 33 =
33
72 - 45 =
27
86 - 20 =
66
41 + 28 =
69
67 + 25 =
92
72 - 11 =
61
86 - 59 =
27
85 - 31 =
54
72 + 15 =
87
75 + 28 =
103
99 - 67 =
32
91 - 74 =
17