Subtraction
5-1
4
5+3-2
6
2 x 4
8
MENTAL MATH
63/7
9
MENTAL MATH
42
16
60-10
50
13+2-4
11
MENTAL MATH
9 x 5
45
MENTAL MATH
40/5=
8
MENTAL MATH
62
36
81-17=
64
52+9-8
53
MENTAL MATH
13 x 3
39
MENTAL MATH
54/6
9
MENTAL MATH
92=
81
250-150-6
94
125+13-18
120
MENTAL MATH
20 x 20
400
MENTAL MATH
144/12
12
MENTAL MATH
112
121