1) (821 + 345) – 245 = 821 + (345 - 245) = 821 + 100= 921;
2) (707 + 432) – 132 =
3) 972 – (72 + 888) =
4) 906 – (306 + 123) =
2) (707 + 432) – 132 =
3) 972 – (72 + 888) =
4) 906 – (306 + 123) =
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Ответ:
2) 1007
3) 1788
4) 723
Пошаговое объяснение: