12×3+49×2怎么做简便计算?

2024-11-22 18:40:46
推荐回答(2个)
回答1:

12×3+49×2
=2*6*3+49*2
=2*18+49*2
=2*(18+49)
=2*67
=134

回答2:

12×3+49×2
=36+(50-1)x2
=36+50x2-1x2
=36+100-2
=136-2
=134