Даю 13 баллов Вычислите:
а) – 72 – 102
б) - 15 3
8
– ( - 4 7
8
)
в) 12 - (- 5
16 )
2. Найдите значение выражения a – b
а) при a = 12, b = - 7 ,25
б) при a = - 7, b = -13 2
9
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