Помагите решить! номера 1123, 1124

Question

Помагите решить! номера 1123, 1124

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Answer 1

1124.
2/7:3/7= 2/7*7/3 = 2/3
4_1/2 - 3_5/6 =9/2 - 23/6 = 27/6 - 23/6 = 4/6 = 2/3
2/3*3_1/3 = 2/3*10/3 = 20/9
2/3+20/9 = 6/9+20/9 = 26/9
6_1/2:9 = 13/2*1/9 = 13/18
26/9 : 13/18 = 26/9*18/13 =