Решите, пожалуйста (1 пример)

1) 0.5 : 1.25 = (1/2) : (5/4) = 1/2 * 4/5 = 2/5
2) 7/5 : 1 4/7 = 7/5 : 11/7 = 7/5 * 7/11 = 49/55
3) 2/5 + 49/55 - 3/11 = 22/55 + 49/55 - 15/55 = 56/55
4) 1.5 + 1/4 = 3/2 + 1/4 = 6/4 + 1/4 = 7/4
5) 56/55 * 3 / (7/4 : 18 1/3) = 56/55 * 3 * 4/7 * 18 1/3 = 56/55 * 3 * 4/7 * 55/3 = 8 * 4 = 32

Ответ. 32

1)0,5:1,25=0,4
2)7/5:1 4/7=7/5*7/11=49/55
3)2/5+49/55=22/55+49/55=71/55
4)71/55-3/11=71/55-15/55=56/55
5)56/55*3=168/55
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6)1,5+1/4=1,5+0,25=1,75=1 3/4
7)1 3/4:18 1/3=7/4*3/55=21/220
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8)168/55:21/220=168/55*220/21=8*4=32