Question

2. Вычислите
a)3/5+1/15 ; b)7/9-13/18 ; c) (3/16+3/10)+(15/32-1/24); d)5/6-(1/2-2/7)​

Answer 1

Пошаговое объяснение:

3/5 + 1/15 = 9/15 + 1/15 = 10/15 = 2/3

7/9 - 13/18 = 14/18 - 13/18 = 1/18

(3/16 + 3/10) + (15/32 - 1/24) = (15/80 + 24/80) + (45/96 - 4/96) = 39/80 + 41/96 = 234/480 + 205/480 = 439/480

5/6 - (1/2 - 2/7) = 35/42 - (21/42 - 12/42) = 35/42 - 9/42 = 26/42 = 13/21