=146/13-68/13+18/7
=78/13+18/7
=6+18/7
=42/7+18/7
=60/7
k nha
146/13 - ( 18/7 + 68/ 13)
= 146/13 - 18/7 - 68/ 13
= 146/13 - 68/13 -18/7
= 6 - 18/7
= 42/7 - 18/7
= 24/7
\(\frac{146}{13}\)-\(\left(\frac{18}{7}+\frac{68}{13}\right)\)
= \(\frac{146}{13}\)-\(\frac{18}{7}\)-\(\frac{68}{13}\)
=\(\frac{146}{13}\) -\(\frac{68}{13}\)\(-\frac{18}{7}\)
=\(6-\frac{18}{7}\)
=\(\frac{42}{7}\)+\(\frac{18}{7}\)
=\(\frac{60}{7}\)
Hok tốt