Question

A. 13+12+-11= ?
B. -49+50+-30=?
C. -32+66+-53=?
D. 0+35+-53=?
E. 13-12+-11=?
F. 13-(12--11)=?
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Answer 1

1. 13+12+-11=14
2. -49+50+-30=-29
3. -32+66+-53=-19
4. 0+35+-53=-18
5. 13-12+-11=-10
6. 13-(12--11)=-10

Explicación:

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