Question

tính nhanh : 1515/2323 x 696969/545454 x 2727/1515

Answer 1

=15/23.(69/54./27/15)

=15/23.23/10

=3/2

Answer 2

\(=\dfrac{15}{23}\times\dfrac{69}{54}\times\dfrac{27}{15}\\ =\dfrac{3}{2}\)

Answer 3

=15/23 x (69/54 x /27/15)

=15/23 x 23/10

=3/2

Answer 4

=15/23.(69/54./27/15)

=15/23.23/10

=3/2

Answer 5

=15/23.(69/54./27/15)

=15/23.23/10

=3/2

Answer 6

=15/23.(69/54./27/15)

=15/23.23/10

=3/2