Question

VA ROG AJUTATI-MA DAU COROANA​

Answer 1

Răspuns:

a)

$\frac{2 \times 4 + 5 \times 2 + 6 \times 3}{4 + 2 + 3} = \frac{8 + 10 + 18}{9} = \frac{36}{9} = 4$

b)

$\frac{15 \times 2 + 20 \times 3 + 18 \times 5}{2 + 3 + 5} = \frac{30 + 60 + 90}{10} = \frac{180}{10} = 18$

c)

$\frac{ \frac{1}{3} \times 6 + \frac{1}{4} \times 4 + \frac{2}{7} \times 14 }{6 + 4 + 14} = \frac{2 + 1 + 4}{24} = \frac{7}{24}$

$\frac{ \frac{2}{9} \times 9 + \frac{3}{9} \times 6 + \frac{16}{9} \times 9 }{9 + 6 + 9 } = \frac{2 + 2 + 16}{24} = \frac{20}{24} = \frac{5}{6}$

d)