简便计算:1.28×37+74×37-37×2 2.48×17+51×84
问题描述:
简便计算:1.28×37+74×37-37×2 2.48×17+51×84
答
!,28X37+74X37-37X2
=37X(28+74-2)
=37X100
=3700
2 48X17+51X84
=3X16X17+51X84
=51X(16+84)
=5100