Question

Вычислите.657 номер,плиииз​

Answer 1

1) (3 1/3 + 5 1/6) • 2/5 - 2 3/4 : ( 1 1/2 - 2/5) =
(10/3 + 31/6) • 2/5 - 11/3 : ( 3/2 - 2/5) =
(20/6 + 31/6) • 2/5 - 11/3 : (15/10 - 4/10) =
= 51/6 • 2/5 - 11/3 : 11/10 =
= 51/15 - 10/3 = 51/15 - 50/15 = 1/15

3) (1/8 + 2/9 - 1/4) • 5 1/7 : (7/9 - 2/3 + 1/6) =
= (9/72+16/72-18/72)•36/7 : (14/18+12/18+3/18)=
= 7/18 • 36/7 : 29/18 = 7/18 • 36/7 • 18/7 =
= 36/7 = 5 1/7