Question

tính nhanh:  135+86+65-36+17+50+83

Answer 1

400

,.....................................

Answer 2

135 + 86 + 65 - 36 + 17 + 50 + 83 

= ( 135 + 65 ) + 86 - 36 + ( 17 + 83 ) + 50

= 200 + 86 - 36 + 100 + 50

= 286 - 136 + 50

= 286 - 186

= 100

Answer 3

135 + 86 + 65 - 36 + 17 + 50 + 83 

= ( 135 + 65 ) + 86 - 36 + ( 17 + 83 ) + 50

= 200 + 86 - 36 + 100 + 50

= 286 - 136 + 50

= 286 - 186

= 100

Answer 4

135 + 86 + 65 - 36 + 17 + 50 + 83

= ( 135 + 65 ) + 86 - 36 + ( 17 + 83 ) + 50

= 200 + 86 - 36 + 100 + 50

= 286 - 136 + 50

= 286 - 186

= 100