Khó thế =)

\(=\left(\dfrac{377}{-231}-\dfrac{123}{89}+\dfrac{34}{791}\right)\cdot\left(\dfrac{4}{24}-\dfrac{3}{24}-\dfrac{1}{24}\right)=0\)

= (377/-231-123/89+34/791).(4/24-3/24-1/24)

=(377/-231-123/89+34/791).0

=0

(377/-231-123/89+34/791)*(1/6-1/8-1/24)

= (377/-231-123/89+34/791)*[4/24+(-3/24)+(-1/24)]

= (377/-231-123/89+34/791)* 0

=                    0

\(\left(\frac{377}{-231}-\frac{123}{89}+\frac{34}{791}\right).\left(\frac{1}{6}-\frac{1}{8}-\frac{1}{24}\right)\)

\(=\left(\frac{337}{-231}-\frac{123}{89}+\frac{34}{791}\right).\left(\frac{4-3-1}{24}\right)\)

\(=\left(\frac{337}{-231}-\frac{123}{89}+\frac{34}{791}\right).0\)

\(=0\)

2.3/7+(2/9 - 1+3/7) - 5/3: 1/9

giúp mình với

Ta có : 

\(\left(\frac{377}{-231}-\frac{123}{89}+\frac{34}{791}\right).\left(\frac{1}{6}-\frac{1}{8}-\frac{1}{24}\right)\)

\(=A.\left(\frac{4}{24}-\frac{3}{24}-\frac{1}{24}\right)\)

\(=A.0\)

\(=0\)

Chúc bạn học tốt !!!! 

\(=\left(\frac{377}{-231}-\frac{123}{89}+\frac{34}{791}\right)\cdot0=0\)

\(\left(\frac{377}{-213}-\frac{123}{89}+\frac{34}{791}\right).\left(\frac{1}{6}-\frac{1}{8}-\frac{1}{24}\right)\)

\(=\left(\frac{377}{-213}-\frac{123}{89}+\frac{34}{791}\right).0\)

\(=0\)

(377/-213 - 123/89 +34/791 ).  (1/6 - 1/8 - 1/24). 

=(377/-213 - 123/89+34/791). 0

= 0

\(\left(\frac{337}{-231}-\frac{123}{89}+\frac{34}{791}\right)\cdot\left(\frac{1}{6}-\frac{1}{8}-\frac{1}{24}\right)\)

\(=\left(\frac{337}{-231}-\frac{123}{89}+\frac{34}{791}\right)\cdot\left(\frac{4-3-1}{24}\right)\)

\(=\left(\frac{337}{-231}-\frac{123}{89}+\frac{34}{791}\right)\cdot0\)

\(=0\)

\(\left(\frac{377}{231}-\frac{123}{8969}+\frac{34}{791}\right)\cdot\left(\frac{1}{6}-\frac{1}{8}-\frac{1}{24}\right)\)

\(=\left(\frac{377}{231}-\frac{123}{8969}+\frac{34}{791}\right)\cdot\left(\frac{4-3-1}{24}\right)\)

\(=\left(\frac{377}{231}-\frac{123}{8969}+\frac{23}{791}\right)\cdot0\)

\(=0\)

\(\left(\frac{337}{231}-\frac{123}{8969}+\frac{34}{791}\right)\).\(\left(\frac{1}{6}-\frac{1}{8}-\frac{1}{24}\right)\)
=\(\left(\frac{337}{231}-\frac{123}{8969}-\frac{34}{791}\right).0\)
=0