Question

3. Calculati. pls e urgent (dau coroana) ​

Answer 1

Răspuns:

Explicație pas cu pas:

$a)2 \times \frac{3}{7} = \frac{6}{7}$

$2 \frac{3}{7} = \frac{2 \times 7 + 3}{7} = \frac{14 + 3}{7} = \frac{17}{7}$

$b)4 \times \frac{1}{8} = \frac{4}{8} = \frac{1}{2}$

$4 \frac{1}{8} = \frac{4 \times 8 + 1}{8} = \frac{32 + 1}{8} = \frac{33}{8}$

$c)3 \times \frac{2}{9} = \frac{6}{9} = \frac{2}{3}$

$3 \frac{2}{9} = \frac{3 \times 9 + 2}{9} = \frac{27 + 2}{9} = \frac{29}{9}$

$d)5 \times \frac{1}{4} = \frac{5}{4}$

$5 \frac{1}{4} = \frac{5 \times 4 + 1}{4} = \frac{20 + 1}{4} = \frac{21}{4}$

$e)7 \times \frac{1}{4} = \frac{7}{4}$

$7 \frac{1}{4} = \frac{7 \times 4 + 1}{4} = \frac{28 + 1}{4} = \frac{29}{4}$

$f)12 \times \frac{5}{6} = \frac{60}{6} = 10$

$12 \frac{5}{6} = \frac{12 \times 6 + 5}{6} = \frac{72 + 5}{6} = \frac{77}{6}$