Вычислите б)1/2 : 3/8 - 4/9 :3/5 г)3/5 : 8/9 - 3/5 * 8/9

Question

Вычислите б)1/2 : 3/8 - 4/9 :3/5 г)3/5 : 8/9 - 3/5 * 8/9

Comments

=17/120

Answer 1

1)3/5:8/9=3/5*9/8=27/40; 2)-3/5*8/9=-8/15;
3)27/40-8/15=81/120-64/120=17/120.

Answer 2

27/40-8/15=81/120-64/120=17/120
3/5:8/9=3/5×9/8=27/40
-3/5×8/9=-8/15

Comments

инвалид