Question

[Bùi Quang Minh]

21/11*68/63*22/17

(27/25-4/9)-(2/25+5/9)

Tính bằng cách thuận tiện

Answer 1

[Cristiano Ronaldo]

 \(\frac{21}{11}\times\frac{22}{17}\times\frac{68}{63}\)

=\(\frac{21}{1}\times\frac{2}{17}\times\frac{68}{63}\)

= 21 x \(\frac{8}{63}\)

=\(\frac{8}{3}\)