Question

Tính nhanh:

5/23 : ( 3/26 + 7/9) - 5/23 : (23/26 + 2/9)

Ai giải giúp bài này với !

Answer 1

5/23 : ( 3/26 + 7/9) - 5/23 : (23/26 + 2/9)

=\(\frac{5}{23}\)\(\div[(\frac{3}{26}+\frac{7}{9})-(\frac{23}{26}+\frac{2}{9})]\)

=\(\frac{5}{23}\div\)\([(\frac{3}{26}+\frac{23}{26})-(\frac{7}{9}+\frac{2}{9})]\)

=\(\frac{5}{23}\div[1-1]\) 

=\(\frac{5}{23}\div0\) 

=0

Answer 2

5/23 : ( 3/26 + 7/9 ) - 5/23 : ( 23/26 + 2/9 )

=5/23 : { (23/26 + 3/26) - ( 7/9 + 2/9 )

=5/23 : { 1-1 }

=5/23 : 0

=0