Question

using appropriate properties of addition find the following:3/7+4/9 + -5 /21 + 2 / 3
the first person who will give me the answer i will follow him/her​​

Answer 1

Answer:

$\frac{3}{7} +\frac{4}{9} +\frac{-5}{21} +\frac{2}{3}$

= $(\frac{2}{3}+\frac{4}{9}) + (\frac{3}{7} +\frac{-5}{21})$

= $(\frac{6}{9}+\frac{4}{9}) + (\frac{9}{21} +\frac{-5}{21})$

= $\frac{10}{9} + \frac{4}{21}$

= $\frac{70}{63} + \frac{12}{63}$

= $\frac{82}{63}$

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