Задача Задача №133005
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Ответ: (2 3/5 - 1 7/10) + (1 1/2 - 7/20) = 13/5 + 3/2 - 7/20 = 26/10 + 15/10 - 7/20 = 41/10 - 7/20 = (41*2 - 7)/20 = 75/20 = 3 3/4
Ответ: (2 3/5 - 1 7/10) + (1 1/2 - 7/20) = 13/5 + 3/2 - 7/20 = 26/10 + 15/10 - 7/20 = 41/10 - 7/20 = (41*2 - 7)/20 = 75/20 = 3 3/4