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Adding and Subtracting by 10s
0
%
0
0
0
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34 - 10 =
24
Oops!
Okay!
20 + 70 =
90
Oops!
Okay!
25 + 40 =
65
Oops!
Okay!
47 + 30 =
77
Oops!
Okay!
20 + 80 =
100
Oops!
Okay!
52 + 20 =
72
Oops!
Okay!
76 - 40 =
36
Oops!
Okay!
70 - 40 =
30
Oops!
Okay!
50 - 10 =
40
Oops!
Okay!
60 + 40 =
100
Oops!
Okay!
43 + 20 =
63
Oops!
Okay!
11 + 20 =
31
Oops!
Okay!
20 - 0 =
20
Oops!
Okay!
90 - 60 =
30
Oops!
Okay!
81 - 30 =
51
Oops!
Okay!
28 + 50 =
78
Oops!
Okay!
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