Question

найдите значение выражения (3/7-1/4)+(2/3-3/5)+0,8

Answer 1

(3/7-1/4)+(2/3-3/5)+0,8=(12/28-7/28)+(10/15-9/15)+8/10=5/28+1/15+4/5=
=75/420+28/420+336/420=439/420=1 19/420