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Mental math
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478+955+324+543=
2300
Oops!
Okay!
30+13=
43
Oops!
Okay!
900+10+20
930
Oops!
Okay!
10+10+10+10+500=
540
Oops!
Okay!
30+17000=
17030
Oops!
Okay!
35-27+70=
78
Oops!
Okay!
366+700+50-400=
686
Oops!
Okay!
35+5+5+5+5=
55
Oops!
Okay!
8993-2356
6637
Oops!
Okay!
34-12=
22
Oops!
Okay!
55-30+21-35=
11
Oops!
Okay!
34+678-305=
407
Oops!
Okay!
30+23+90-50=
93
Oops!
Okay!
23-14=
9
Oops!
Okay!
900+10+20
930
Oops!
Okay!
20+78=
98
Oops!
Okay!
50+135=
185
Oops!
Okay!
4+5+7-3+50=
63
Oops!
Okay!
1+1+1+1+1+1+1+1=
8
Oops!
Okay!
900+10+20
930
Oops!
Okay!
250+250=
500
Oops!
Okay!
1000+4000+4000+5000=
14000
Oops!
Okay!
39+1=
40
Oops!
Okay!
120+35=
155
Oops!
Okay!
123+800=
923
Oops!
Okay!
378-127+980=
1231
Oops!
Okay!
137+568=
705
Oops!
Okay!
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