December 2018 1 21 Report
Wykonaj dodawanie wg wzoru:
14+(-9) = 5 + 9 + (-9) = 5 + 0 = 5
a) 26 +(-23)
b)(-33) + 27
c) 17+ (-13)
d) 46+(-64)
e)(-31) + 45
f) 88 + (-108)
daje naj!
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