Question

Rezultatul calculului 2/21•5 1/4-3:6/11

Answer 1

2 / 21 x 5 = 10 / 21

1 / 4 - 3 : 6 / 11 = 1 / 4 - 3/1 x 6 / 11 = 1 / 4 - 18 / 11 = 11 / 44 - 72 / 44=
 = - 61 / 44

Answer 2

$\frac{2}{21}*5= \frac{5*2}{21} = \frac{10}{21} \\ \\ \\ \\ \frac{1}{4}-3: \frac{6}{11}\to \frac{1}{4}-3* \frac{11}{6}\to \frac{1}{4}- \frac{3*11}{6} \to \frac{1}{4}- \frac{33}{6} \\ \\ \\ \\ \\\to \frac{3}{12}- \frac{66}{12} = \frac{-63}{12}$
1/4 am amplificat cu 3 si 33/6 am amplificat cu 2.Numitorul comun este 12 la ambele fractii.