Мерзляк полонсикй якир помогите! номер 342(1 2)

Question

Мерзляк полонсикй якир помогите!
номер 342(1 2)

---

Comments

А какой класс?

Answer 1

1.        ....................=4/9

1)   4 4/9 * 3 3/8=40/9 * 27/8=5*3=15
2)   15 4/9 - 15=4/9

.
2.        ...............=2 1/4

1)   1 13/15 * 1 19/21=28/15 * 40/21=(4*8)/(3*3)=32/9=3 5/9
2)    6 - 3 5/9=5 9/9 - 3 5/9=2 4/9
3)   81/88 * 2 4/9=81/88 * 22/9=9/4=2 1/4

.

Answer 2

15 4/9 - 4 4/9*3 3/8 = 15 4/9 - 40/9*27/8 = 15 4/9 - 15 = 4/9
81/88*(6 - 1 13/15*1 19/21) = 81/88*(6 - 28/15*40/21) = 81/88*(6 - 32/9) = 81/88*(6 - 3 5/9) = 81/88*2 4/9 = 81/88*22/9 = 9/4 = 2 1/4