OPTIONS:
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>Addition ( + )
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>Subtraction ( - )
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>Subtraction Adv ( - )
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>1
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>2
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>3
addition
Name/名前: ________________
42
+ 31
49
+ 10
20
+ 31
12
+ 15
69
+ 21
22
+ 27
79
+ 16
73
+ 20
41
+ 12
41
+ 10
78
+ 12
19
+ 45
37
+ 36
23
+ 47
67
+ 10
31
+ 48
77
+ 12
38
+ 49
13
+ 84
22
+ 64