Question

Calculeaza
3 1/2+1 2/3+1 3/4

Answer 1

$3 \times \frac{1}{2} = \frac{3 \times 2 + 1}{2} = \frac{7}{2} \\ 1 \times \frac{2}{3} = \frac{5}{2} \\ 1 \times \frac{3}{4} = \frac{7}{4} \\ = > \frac{7}{2} + \frac{5}{2} + \frac{7}{4} \\ aducem \: la \: numitorul \: comun \\ care \: este \: 4 \\ \frac{14}{4} + \frac{10}{4} + \frac{7}{4} = \frac{31}{4}$
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