Question

Выполните действия (7-2 2/5:8/15):5 5/8 срочно ​

Answer 1

Ответ:

(7 - 2 2/5 : 8/15) : 5 5/8 = 4/9

1) 2 2/5 = 2 2/5 = 2 · 5 + 2/5 = 10 + 2/5 = 12/5

2) 12/5 : 8/15 = 12/5 · 15/8 = 12 · 15/5 · 8 = 180/40 = 20 · 9 /20 · 2 = 9/2

3) 7 - 9/2 = 7/1 - 9/2 = 7 · 2/1 · 2 - 9/2 = 14/2 - 9/2 = 14 - 9/2 = 5/2

4) 5 5/8 = 5 5/8 = 5 · 8 + 5/8 = 40 + 5/8 = 45/8

5) 45/8 = 5/2 : 45/8 = 5/2 · 8/45 = 5 · 8/2 · 45 = 40/90 = 10 · 4 /10 · 9 = 4/9

Answer 2

Я могу помочь вам решить эту задачу. Вот подробное решение:

(7-2+2/5:8/15):5+5/8

= (7-2+2/5÷8/15):5+5/8

= (7-2+(2/5)×(15/8)):5+5/8

= (7-2+6/8):5+5/8

= (5+6/8):5+5/8

= (5+3/4):5+5/8

= (5×4+3)/4:(5×8+5)/8

= (20+3)/4:(40+5)/8

= 23/4:45/8

= (23/4)÷(45/8)

= (23/4)×(8/45)

= 184/180

= 92/90

= 46/45

Ответ: 46/45