Question

Arătați ca (1/2+1/5) x 20/7=2 ​

Answer 1

Răspuns:

Explicație pas cu pas:

1/2 + 1/5 = 5/10 + 2/10 = 7/10

7/10 x 20/7 = 140/70 = 2

Answer 2

$(\frac{1(5}{2(5} + \frac{1(2}{5(2} ) \ \ \times \frac{20}{7} = ( \frac{5}{10} + \frac{2}{10} ) \times \frac{20}{7} = \frac{7}{10} \times \frac{20}{7} = \frac{7 \times 20}{10 \times 7} = \frac{140}{70} = 2$