Question

найдите значение выражения:8-4,2÷(2 5/14 -1 4/21)=

Answer 1

=8-4,2:(2 15/42-1 8/42)=8-4,2:1 7/42=8-4,2:1 1\6= 8-4 1/5:7/6=8-21/5*6/7=
= 8-18/5=8-3 3/5=4 2/5