выполните действия :
1) 3/8×4/5:9/10=
2) 6/7:3/5×1 2/5=
3) 2 2/11×1 3/8÷3/4=
4) 11/23× 3 2/7 ÷ 5 1/2=

спасибо огромное

1) 3/5× (2 2/3÷3 1/5)

1 1/8×(9 1/3÷1 3/4)

3/5 * (2 2/3 : 3 1/5) = 3/5 * (8/3 : 15/5) = 3/5 * (8/3 * 5/15) = 3/5 * 40/75 = 40/25 = 1 15/25 = 1 3/5

1) 3/8 * 4/5 : 9/10 = 3/10 * 10/9 = 1/32) 6/7 : 3/5 * 1 2/5 = 6/7 * 5/3 * 7/5 = 10/7 * 7/5 = 23) 2 2/11 * 1 3/8 : 3/4 = 24/11 * 11/8 = 3/1 * 4/3 = 44) 11/23 * 3 2/7 : 5 1/2 = 11/23 * 23/7 : 11/2 = 11/7 * 2/11 = 2/7