Вычислите:
а)(-7)+(+5)+(+8)(-10);
б)(+12)+(-2)-(+10)+(-20);
в)(+18)+(-2)-(-5)-(-15);
г)(-10)+(-2)-(-8)+(-5);
а)(-7)+(+5)+(+8)(-10);
б)(+12)+(-2)-(+10)+(-20);
в)(+18)+(-2)-(-5)-(-15);
г)(-10)+(-2)-(-8)+(-5);
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Answers & Comments
б)(+12)+(-2)-(+10)+(-20) = -20
в)(+18)+(-2)-(-5)-(-15) = 26
г)(-10)+(-2)-(-8)+(-5) = -9