Question

tính nhanh : 

\(35\times\left(14-23\right)-23\times\left(14-35\right)\)

Answer 1

= 35 x  14 - 35 x 23 - 23 x 14 + 23 x 35

= (35 x 14 - 23  x14) + (-35 x 23 + 23 x 35)

= 14 x (35 - 23) + 0

= 14 x 12

= 168

Answer 2

= 35 .14 - 35.23 - 23.14 -23.35   ( 35.23 vs 23.35 hết)

=35.14 -23.14 

=(35-23 ) .14

= 12 .14= 168 

Answer 3

= 168 nhé