Вычислите -3/4*(-2/5) , 7/8/(-5/6) , 5/7*(-2/3), (-4/5)/(-2/7), -3/4*16/21, (-7/9)/(-14/45) , (-12/19)*38/45, -15/22/(-5/11) сорчно

3/4 * 2/5 = 0,3
7/8 * (-6/5) = - (7/4 * 3/5) = -1,05
5/7*(-2/3) = - 10/21
4/5 * 7/2 = 28/10 = 2,8
- (3/4 * 16/21) = - 4/7
7/9 * 45/14 = 5/2 = 2,5
15/22 * 11/5 = 3/2 =1,5

-3/4×(-2/5)=3/10

7/8÷(-5/6)=7/8×(-6/5)=-21/20=-1 1/20

5/7×(-2/3)=-10/21

-4/5×(-2/7)=8/35

-3/4×16/21=-4/7

-7/9÷(-14/45)=7/9×45/14=5/2=2 1/2

-12/19×38/45=-8/15

-15/22÷(-5/11)=15/22×11/5=3/2=1 1/2