Срочно плизз.Расписать по действиям.

Question

Срочно плизз.Расписать по действиям.

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Answer 1

А) 4 1/2+2/3*3 6/7-5 3/4= 1 9/28
1. 2/3*3 6/7= 2/3*27/7= 18/7= 2 4/7
2. 4 1/2+2 4/7= 4 7/14+2 8/14= 6 15/14= 7 1/14
3. 7 1/14-5 3/4= 7 2/28-5 21/28= 6 30/28- 5 21/28= 1 9/28

б) -2 1/4*(-1/3)²= -2 1/4*1/9= -9/4*1/9= -9/36= -1/4

Answer 2

4 1/2 + 2/3*(3 6/7) - (5 3/4) = (4*2+1)/2 + 2/3*(3*7+6)/7 - (5*4+3)/4 =
= 9/2 + 2/3*27/7 - 23/4 = 18/4 + 18/7 - 23/4 = 18/7 - 5/4 =
= (18*4 - 7*5)/(7*4) = (72 - 32)/28 = 40/28 = 10/7