Question

va rog ajutati-ma
dau coroana

Answer 1

Răspuns:

Explicație pas cu pas:

7.

a + 3/10 = 7/10

a = 7/10 - 3/10 = 4/10 = 2/5

_________

a + 3/10 = 3/2

a + 3/10 = 15/10

a = 15/10 - 3/10 = 12/10 = 6/5

__________

a + 3/10 = 3/5

a + 3/10 = 6/10

a = 6/10 - 3/10 = 3/10

__________

a + 3/10 = 1 3/10

a = 13/10 - 3/10 = 10/10 = 1

__________

a + 3/10 = 2 1/15

a + 3/10 = 31/15

a + 9/30 = 62/30

a = 62/30 - 9/30 = 53/30

__________________________________

8.

13/12 - 7/12 = 6/12 = 1/2

7/6 - 7/12 = 14/12 - 7/12 = 7/12

25/24 - 7/12 = 25/24 - 14/24 = 11/24

2 1/18 - 7/12 = 37/18 - 7/12 = 74/36 - 21/36 = 53/36

1 1/3 - 7/12 = 4/3 - 7/12 = 16/12 - 7/12 = 9/12