Question

номер 287 и 288 пж помогите​

Answer 1

Ответ:

Пошаговое объяснение:

№ 287

а) 17/28 * 3/5 = ( 17*3)/(28*5)= 51/140

b) -3/8 * 11/12=(-3*11)/(8*4*3)= -11/32

c) -7/38 * 19/28 = ( -7*19)/(2*19*4*7)=-1/8

d) 27/36 * 18/21= (3*9*18)/(2*18*7*3)=9/14

e) 16/25 * 15/8= (4*4*3*5)/(5*5*4*2)=6/5= 1 1/5

f) 7* 17/21= 17/3=5 2/3

№288

2/13*9/14=(2*9)/(13*7*2)=9/91

5/8 *(-2/25) = (5*(-2))/(2*4*5*5)=-1/20

-19/18 * 6/57=( -19*6)/(3*6*3*19)= -1/9

72/80 * 7/54 = (9*8*7)/(8*10*9*6)=7/60

16/35 * 15/88= (8*2*3*5)/(7*5*8*11)=6/77

4/27 * 54 = 4*2=8