Question

срочнооооооо 15 балов​

Answer 1

Ответ:

Пошаговое объяснение:

1)

a) 5/9 + 3/4 = 20/36 + 27/36 = 47/36

б) 7/8 - 3/4 = 7/8 - 6/8 = 1/8 = 0,125

в) 4 * 3/8 = 3/2 = 1,5

2)

S(1) = 3/4 * 12 = 3 * 3 = 9 (км)

S(2) = 1/2 * 16 = 8 (км)

S(1) - S(2) = 9 -8 = 1 (км)

S(1) > S(2) на 1 км

3)

а) 15/7 * 28/9 = 5 * 4/3 = 20/3

б) 88/7 - 11/5 - 4/7 = 440/35 - 77/35 - 20/35 = 343/35 = 9,8

5) 11/12 * 24/7 + (19/6 - 37/15) * 20/7

(1) 19/6 - 37/15 = 95/30 - 74/30 = 21/30 = 7/10

(2) 11/12 * 24/7 = 22/7

(3) 7/10 * 20/7 = 2

(4) 22/7 + 2 = 22/7 + 14/7 = 36/7