Question

Tính:

(\(\frac{2}{7}\)+\(\frac{4}{9}\))+\(\frac{5}{7}\)

Answer 1

(2/7+4/9)+5/7=13/9(có rút gọn)

k mk nha!^^

Answer 2

(\(\frac{2}{7}\)+\(\frac{4}{9}\))+\(\frac{5}{7}\)

=(\(\frac{2}{7}\)+\(\frac{5}{7}\))+\(\frac{4}{9}\)

=1+\(\frac{4}{9}\)

=\(\frac{13}{9}\) k mk nha!!!! Thank nhìu!!!!

Answer 3

= (\(\frac{2}{7}\) + \(\frac{5}{7}\) ) +\(\frac{4}{9}\)

= 1+\(\frac{4}{9}\)

= \(\frac{13}{9}\) = \(1\frac{4}{9}\)

Answer 4

= 46/63 + 5/7 =91/63