Ответы на вопрос:
300 - (90 + 70) + (86 - 46) = 180 1) 90 + 70 = 160 2) 86 - 46 = 40 3) 300 - 160 = 140 4) 140 + 40 = 180 90 : (10 * 9) : (9 : 9) = 1 1) 10 * 9 = 90 2) 9 : 9 = 1 3) 90 : 90 = 1 4) 1 : 1 = 1 0 * 8 + 7 = 7 1) 0 * 8 = 0 2) 0 + 7 = 7 0 * (8 + 7) = 0 1) 8 + 7 = 15 2) 0 * 15 = 0 91 : 13 * 7 = 49 1) 91 : 13 = 7 2) 7 * 7 = 49 84 : (14 * 3) = 2 1) 14 * 3 = 42 2) 84 : 42 = 2
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