October 2018 2 23 Report

1. Oblicz:
a) -23 + -7 =
-14 + -21 =
-6 + -18 =
-21 + 32 =
b) -72 + -38 =
-143 + -57 =
- 53 + -12 =
- 21 + 89 =
2. Liczbę -25 napisz w postaci różnicy
a ) dwóch liczb dodatnich
b ) dwóch liczb ujemnych


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