Б) 3/6 * 5 + 5/56 : 1/5 = 2 53/56
1) 3/6 * 5 = 15/6
2) 5/56 : 1/5 = 25/56
3) 15/6 + 25/56 = (15*28)/168 + 75/168 = 420/168 + 75/168 = 495/168 =
= 2 159/168 = 2 53/56
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г) 4/5 : 5/8 - 4/5 * 24/25 + 1/25 : 5/4 = 13/25
1) 4/5 : 5/8 = 32/25
2) 4/5 * 24/25 = 96/125
3) 1/25 : 5/4 = 4/125
4) 32/25 - 96/125 = 160/125 - 96/125 = 64/125
5) 64/125 + 4/125 = 65/125 = 13/25