Выполни действие (28,24 -29,1) * (11,75 + 30 5/6) / (40,4 - 6 1/3)

-43/40

Объяснение:

По действиям

1) 28,24 - 29,1 = -(29,1 - 28,24) = -0,86 = -86/100 = -43/50

2) 11,75 + 30 5/6 = 11 3/4 + 30 5/6 = 41 + (9/12 + 10/12) = 41 + 19/12 = 42 7/12 = (42*12+7)/12 = 511/12

3) 40,4 - 6 1/3 = 40 - 6 + (4/10 - 1/3) = 34 + (12/30 - 10/30) = 34 2/30 = 34 1/15 = (34*15+1)/15 = 511/15

4) -43/50*511/12 / (511/15) = -43/50*511/12*15/511 = -43/50*15/12 = -43/50*5/4 = -(43*5)/(5*10*4) = -43/40