А2. Выполните сложение чисел с разными знаками по правилу: а) -5 + 8 = ______________ = ________________

б) 6 + (-12) = _______________ = ____________________

в) 21, 32 + (- 24, 18) = ______________ = _____________________

г) -3/8 + 3/4 = ___________________ = ___________________​
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