Question

Calculati : 3/10 - 3/10 : 6/20
Va rog ajutati-ma.

Answer 1

 3/10 - 3/10 : 6/20 =
= 3/10 - 3/10 × 20/6 =
= 3/10 -  2/2 =
= 3/10 -  1 =
=(3-10)/10=
=-7/10

Answer 2

$\displaystyle \frac{3}{10} - \frac{3}{10} : \frac{6}{20} = \frac{3}{10} - \frac{3}{10} \cdot \frac{20}{6} = \frac{3}{10} - \frac{60}{60} = \frac{3}{10} -1= \frac{3-10}{10}= \frac{-7}{10}$