January 2020 2 123 Report
8) Calcule:

a) -12 - 13 - 28 - 17 - 19 - 23 - 50=
b) 600+1228+456+38+169=
c) -608+309
d) 608-309=
e) 12 - 15 - 12 + 15 + 30 + 30 - 60 - 12 -12 + 24=
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