Question

Найдите значение выражения 1) (3,5-2,9)-(3,7-9,1) 2) (2/5-2/3)-(3/7-3/5). Решите пажалуйста

Answer 1

1) (3,5-2,9)-(3,7-9,1) =3,5-2,9-3,7+9,1=-6,6+12,6= 6

2) (2/5-2/3)-(3/7-3/5)=2/5-2/3-3/7+3/5 = 1 - (14/21+9/21)= 1 - 23/21 = - 2/21

Answer 2

(3,5-2,9)-(3,7-9,1) = 0.6 + 5.4 = 6
(2/5-2/3)-(3/7-3/5) = (6/15-10/15) - (15/30-21/30)=-4/15 + 6/30 = -8/30+6/30=-2/30= -1/15