Question

Tính 

A = ( 878787 / 959595 + - 8787 / 9595 ) . 1234231 / 5678765

Answer 1

\(A=\left(\frac{878787}{959595}+-\frac{8787}{9595}\right).\frac{1234231}{5678765}\)

\(=\left(\frac{87}{95}+-\frac{87}{95}\right).\frac{1234231}{5678765}\)

\(=0.\frac{1234231}{5678765}=0\)

Answer 2

Ta có :

\(A=\left(\frac{878787}{959595}+\frac{-8787}{9595}\right)\)\(.\frac{1234231}{5678765}\)

\(A=\left(\frac{878787\div10101}{959595\div10101}-\frac{8787\div101}{9595\div101}\right)\)\(.\frac{1234231}{5678765}\)

\(A=\left(\frac{87}{95}-\frac{87}{95}\right)\)\(.\frac{1234231}{5678765}\)

\(A=0.\frac{1234231}{5678765}\)

\(A=0\)

Vậy A=0 .