Question

4. Află a + b, dacă: a = 1/5 + 3/5 + 1/5 +8/5-1
b= 2/5 + 10/5-1 + 5/5 -4/5​

Answer 1

Răspuns:

a + b

Explicație pas cu pas:

$a = \frac{1}{5} + \frac{3}{5} + \frac{1}{5} + \frac{8}{5} - 1 = \frac{1 + 3 + 1 + 8 - 5}{5} = \frac{8}{5}$

$b = \frac{2}{5} + \frac{10}{5} - 1 + \frac{5}{5} - \frac{4}{5} = \frac{2 + 10 - 5 + 5 - 4}{5} = \frac{8}{5}$

$a + b = \frac{8}{5} + \frac{8}{5} = \frac{16}{5} = \bf 3 \frac{1}{5}$