Question

Найдите значение выражения

Answer 1

1/1/30+1/42=17,5
1)1/30+1/42=7/210+5/210=12/210=6/105
2)1:6/105=105/6=17,5
0,8/1-1/8=32/35
1)1-1/8=8/8-1/8=7/8
2)4/5:7/8=4/5*8/7=32/35

Answer 2

N 1
1) 1/30 + 1/42 = 7/210 + 5/210 = 12/210 = 6/105
2) 1 : ( 6/105) = 105/6 = 17,5
Ответ 17,5
N 2
1) 1 - ( 1/8 ) = 7/8
2) 0,8 : ( 7/8 ) = 4/5 : ( 7/8 ) = 32/35