Question

下面几道简便计算求解答

Answer 1

36×1.09+1.2×67.3
=12×3×1.09+12×6.73
=12×(3×1.09+6.73)
=12×(3.27+6.73)
=12×10
=120

3.6*25.4+37.9*6.4
3.6×25.4+37.9×6.4
=3.6×25.4+(25.4+12.5)×6.4
=3.6×25.4+25.4×6.4+12.5×6.4
=3.6×25.4+25.4×6.4+12.5×8×0.8
=25.4×(3.6+6.4)+100×0.8
=254+80
=334

235*12.1+235*42.2-135*54.3

=235X（12.1+42.2）-135X54.3
=235×54.3-135×54.3
=54.3×（235-135）
=54.3×100
=5430

124.68+324.68+524.68+724.68+924.68

=(100+300+500+700+900)+24*5+0.6*5+0.08*5
=2500+120+3+0.4
=2623.4

Answer 2

36*1.09+1.2*67.3
=12*(1.09*3+6.73)
=12*10
=120
3.6*25.4+37.9*6.4
=3.6*6.4*4+(38-0.1)*6.4
=6.4*(14.4+38-0.1)
=6.4*52.3
=334.72
235*12.1+235*42.2-135*54.3
=235*54.3-135*54.3
=54.3*(235-135)
=5430
124.68+324.68+524.68+724.68+924.68
=(124+324+524+724+924)+0.68*5
=524*5+3.4
=2620+3.4
=2623.4