January 2020 1 140 Report
7) Calcule:

a) -21 + 13 + 22 - 19=
b) -82 + 43 + 45 - 17=
c) -21 + 31 + 19 - 16 + 61=
d) 90 - 65 - 35 + 102 + 18- 160=
e) 62 - 101 - 94 + 47 + 81 - 36 - 41=
f) -2 + 38 - 17 - 16=
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