Выполните действия: 1 3/5 * 8 + 2,9 * 5 (60-18 3/4) : 25 ------------------------ +...

Question

Выполните действия:
1 3/5 * 8 + 2,9 * 5 (60-18 3/4) : 25
------------------------ + -----------------------
7,5 * 1/3 - 0,5 (7/12 + 0,15) * 15

9 1/2 :1,9 - 4 1/5 (6 + 7 1/2) : 15
---------------------- + -------------------
2,32 * 15/29 + 4/5 (1 7/15 + 1/3)* 5

Пожалуйста помогите.

Answer 1

8/5 • 8 + 29/10 • 5 (60–75/4) : 25 =
= 21 1/20
1) 8/5 • 8 = 64/5
2) 60–75/4 = 165/4
3) 5 • 165/4 = 825/4
4) 825/4 : 25 = 825/100 = 33/4
5) 64/5 + 33/4 = (256+165)/20 =
= 421/20 = 21 1/20

15/2 • 1/3–1/2 (7/12+3/20) • 15 = –3
1) 15/2 • 1/3 = 15/6
2) 7/12+3/20 = (35+9)/60 = 44/60 =
= 11/15
3) 1/2 • 11/15=11/30
4) 11/30 • 15 = 11/2
5) 15/6–11/2 = (15–33)/6 = –18/6 = –3

19/2 : 19/10–21/5 (6+15/2) : 15=1 11/50
1) 19/2 : 19/10 = 5
2) 6+15/2 = 27/2
3) 21/5 • 27/2 = 567/10
4) 567/10 : 15 = 567/150
5) 5–567/150 = 183/150 = 1 33/150 =
= 1 11/50

58/25 • 15/29+4/5•(22/15+1/3) •5 =
= 11 1/15
1) 58/25 • 15/29 = 6/5
2) 22/15+1/3 = 37/15
3) 4/5 • 37/15 = 148/75
4) 148/75 • 5 = 148/15
5) 6/5+148/15 = (18+148)/15 = 166/15 =
= 11 1/15

Comments

Спасибо