Question

Calculati:
15 supra 90 - 3 supra 8

Answer 1

$\frac{15}{90} - \frac{3}{8} = \frac{1}{6 } - \frac{3}{8} = \frac{4-9}{24} = \frac{-5}{24} = -\frac{5}{24}$

Answer 2

15/90-3/8=
15/90 simplificam cu 15=1/6
3/8 amplificam cu 3=9/24
1/6 amplificam cu 4=4/24
4/24-9/24=-5/24