Question

Calculați 1/8-1/20+1/15

Answer 1

numitorul comun este 120
1/8 amplif cu 15
1/20 amplif cu 6
1/15 amplif cu 8
15/120 - 6/120 + 8/120=17/120

Answer 2

$\frac{1}{8}- \frac{1}{20}+ \frac{1}{15}= \frac{15}{120}- \frac{6}{120}+ \frac{8}{120}= \frac{17}{120}$