calcule:

a)7 + 20 - 4



b)- 17 + 14 + 3






c)27 - 16 - 10




d)- 25 - 21 - 40



e)35 + 18 + 62




f)-75 + 70 + 50 - 61



g)84 - 79 - 81 + 86



h)- 64 - 96 - 77 + 200 ​
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