Question

completează castele ​

Answer 1

Răspuns:

Explicație pas cu pas:...................................

Answer 2

• a = 5/6,  b = 2/9

a + b = 5/6 + 2/9 = (15 + 4)/18 = 19/18

a - b = 5/6 - 2/9 = (15 - 4)/18 = 11/18

• a = 13,  a + b = 3

b = 3 - 13/6 = (18 - 13)/6 = 5/6

a - b = (13 - 5)/6 = 8/6 = 4/3

• a = 7/8,  a - b = 1/2

b = 7/8 - 1/2 = (7 - 4)8 = 3/8

a + b = (7 + 3)/8 = 10/8 = 5/4

• b = 3/10,  a + b = 2

a = 2 - 3/10 = (20 - 3)/10 = 17/10

a - b = (17/10 - 3/10) = 14/10 = 7/5

• b = 13/12,  a - b = 2/3

a = 2/3 + 13/12 = (8 + 13)/12 = 21/12 = 7/4

a + b = (21+ 13)/12 = 34/12 = 17/6