помогите срочно!!!!!!!!!!!!!!!!!!!!!!!!!
вычислите: 2/5+3/10, 2/7+1/3, 5/6-1/8, 5/18-1/20.
найдите: 4/3 от 24, (2/3)2
решите уравнение:7x+3, 11:x=6
вычислите:(2/3+1)x3, 4(1-1/4), 1/2+1 1/2, 1 3/7-5/7, 4/5:2/5, 1/3x1/3
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