Question

Ex 6 va rogggggggg multtttt ,dau coroana!!!

Answer 1

Explicație pas cu pas:

a / n + b / n  = (a + b) / n

a/b * c/d = a*c / b*d

Astfel:

a) 1/2 * 8/5 = 8/10

b) 1/4 = 4/16

4/16 + 1/16 = 5/16

5/16 * 2/3 = 10 / 16*3 = 5 / 8*3 = 5 / 24

c) 1/2 = 3/6   1/3 = 2/6

1/2 - 1/3 = 1/6

1/6 * 8/9 = 8/ 6*9 = 4 / 3*9 = 4 / 27

d) cmmmc 12, 20 = 4 * 3 * 5 = 60

5/12 = 25/60       3/20 = 9/60

25/60 + 9/60 = 34/60

34/60 * 15/8 = 34 * 15   /    60 * 8   = 17 * 3 / 12 * 4 = 51 / 48