Verified answer

7)

1 3/8-3 1/4=1 3/8-3 2/8= -1 7/8

8)

-2 14/15-1 19/45= -2 42/45-1 19/45=

= -(2 42/45+1 19/45)= -3 61/45= -4 16/45

9)

-3 1/6-(-1 1/4)= -3 1/6+1 1/4= -3 2/12+1 3/12=

= -1 11/12

Пошаговое объяснение:

1 3/8 - 3 1/4 = 1 3/8 - 3 2/8 = 1 3/8 - 2 10/8 =

-1 7/8

-2 14/15 - 1 19/45 = -2 42/45 - 1 19/45 =

-3 61/45 = -4 16/45

-3 1/6 - (-1 1/4) = -3 1/6 + 1 1/4 = -3 2/12 + 1 3/12 =

-2 14/12 + 1 3/12 = -1 11/12