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WorksheetsGroup : O Mental Addition / Subtraction Time : 1 min
Total questions: 20
Worksheet time: 2mins
98
-26
45
36
80
54
-38
68
-56
91
(a)
64
85
-56
39
24
87
-26
98
35
49
(a)
30
67
65
98
16
-57
84
96
-37
64
(a)
69
87
-56
94
-58
63
-59
84
28
-45
(a)
37
94
56
-57
34
16
48
95
27
36
(a)
45
-18
39
57
60
-38
94
87
-52
49
(a)
64
28
-16
97
-38
29
64
-28
83
56
(a)
54
26
97
-57
84
67
-21
80
95
-18
(a)
78
64
-39
94
-28
93
84
61
-84
67
(a)
56
97
-85
64
20
63
98
-87
53
-69
(a)
45
-19
84
26
31
87
-51
26
97
53
(a)
64
-19
87
54
63
95
36
48
-39
67
(a)
15
94
86
-48
16
37
46
-59
94
-21
(a)
19
37
64
-58
34
59
78
-84
65
29
(a)
54
96
-84
26
37
50
-28
94
64
38
(a)
28
19
56
-56
34
28
94
36
87
-54
(a)
50
18
64
29
-87
56
38
49
-27
86
(a)
34
94
25
-36
85
-48
61
-27
56
97
(a)
34
29
64
84
-56
29
37
-26
80
67
(a)
67
19
-38
64
55
-19
50
-47
68
-37
(a)
