Question

Вычислите.
срочно надо,45 баллов​

Answer 1

Пошаговое объяснение:

а)

2/5 + 3/4 + 1/6 = 24/60 + 45/60 + 10/60 =

(24+45+10)/60 =79/60 = 1 19/60

в)

3/7 + 1/2 + 5/8 = 24/56 + 28/56 + 35/56 =

(24+28+35)/56 = 87/56 = 1 31/56

с)

2/9 + 5/6 + 1/2 = 4/18 + 15/18 + 9/18 =

(4+15+9)/18 = 28/18 = 14/9 = 1 5/9

д)

5/8 + 4/10 + 11/20 = 25/40 + 16/40 + 22/40 =

(25+16+22)/40 = 63/40 = 1 23/40