Question

12. 68 + 34. 18 - 34- 142

Answer 1

12.68+34.18-34-142

12.2.34+34.18-34.1-142

=24.34+34.18-34.1-142

=34.(24+18-1)-142

=34.41-142

=1394-142

=1252

 

Answer 2

giống bài mk đã làm nhưng dù sao cx cảm ơn bn

Answer 3

12. 68 + 34. 18 - 34- 142

= 12. 34 .2 +  34 .18 - 34 - 142

= 24 .34 + 34 .18 - 34 .1 -142

= 34 .(24+18-1) - 142

=34 .41 - 142

= 1394 - 142

=1252