Question

Câu 1.  Hãy rút gọn biểu thức:

Answer 1

Answer 2

A=\(\frac{3.7+9.28+15.42+21.56}{6.14+12.35+18.63+30.77}\)

\(\Rightarrow A=\frac{3.7.\left(1+3.4+5.6+7.8\right)}{6.7.\left(2+2.5+3.9+5.11\right)}\)

\(\Rightarrow A=\frac{1+3.4+5.6+7.8}{2.\left(2+2.5+3.9+5.11\right)}\)

\(\Rightarrow A=\frac{1+12+30+56}{2.\left(2+10+27+55\right)}\)

\(\Rightarrow A=\frac{99}{2.94}\)

\(\Rightarrow A=\frac{99}{188}\)

 

 

Answer 3

     A= \(\frac{3.7+9.28+15.42+21.56}{6.14+12.35+18.63+30.77}\) 

=> A= \(\frac{3.7\left(1+3.4+5.6+7.8\right)}{6.7\left(2+2.5+3.9+5.11\right)}\) 

=> A= \(\frac{1+3.4+5.6+7.8}{2\left(2+2.5+3.9+5.11\right)}\) 

=> A= \(\frac{1+12+30+56}{2\left(2+10+27+55\right)}\) 

=> A= \(\frac{99}{2.94}\) = \(\frac{99}{198}\)