Question

2 x 4/ 7 + 2/14

Answer 1

8/7+2/14=9/7

Answer 2

= 8/7 + 2/14=16/14+2/14 =18/14 

Answer 3

nhân chia trước cộng trừ sau ra bang9/7

Answer 4

2x\(\frac{4}{7}\)+\(\frac{2}{14}\)

=\(\frac{8}{7}\)+\(\frac{2}{14}\)

=\(\frac{8x2}{7x2}\)+\(\frac{2}{14}\)

=\(\frac{16}{14}\)+\(\frac{2}{14}\)

=\(\frac{18}{14}\)=\(\frac{9}{7}\)

Answer 5

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