Question

Calculeza x
x=(+9/20) + (-11/18) + (+5/24) + (-7/12)

Answer 1

Răspuns:

9/20 - 11/18 + 5/24 - 7/12 =

Numitor comun :

20 = 2^2 • 5

18 = 2 • 3^2

24 = 2^3 • 3

12 = 2^2 • 3

cmmmc = 2^3 • 3^2 • 5 = 360

(9•18 - 11•20 + 5•15 - 7•30)/360 =

(162 - 220 + 75 - 210)/360 =

(-193)/360