Question

Làm tính nhanh nha ad

68 ×(39 -17) +17× (68 - 34)(

Answer 1

68x(39-17)+17x(68-34)=68x39-17x34+17x68-68x17=34x78-17x34=34x(78-17)=34x61=2074

Answer 2

  68 x ( 39 - 17 ) + 17 x ( 68 - 34 )

= 68 x 39 - 68 x 17 + 17 x 68 - 17 x 34

= 68 x ( 39 - 17 +  17 ) - 17 x 34

= 68 x 39 - 17 x 34 

= 2652 - 578

= 2074