January 2019 2 4 Report
Cwiczenie A. Oblicz w pamieci:

a) 17+8 b) 30+40 c) 67+20 d) 27-8 e) 70-20 f) 49-20
36+9 80+13 80+13 47-9 120-30 95-50
124+6 140+30 120+18 135-6 270-50 145-20
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