2.4×37.5%+6.6×3/8+0.375简便计算
解答：
2.4×37.5%+6.6×3/8+0.375
＝2.4x0.375+6.4x0.375+0.375
=0.375x(2.4+6.6+1)
=0.375x10
=3.75
2.4×37.5%+6.6×3/8+0.375
=2.4×0.375+6.6×0.375+0.375
=0.375×（2.4+6.6+1）=0.375×10=3.75
如图
2.4*37.5%+6.6*3/8+0.375
=2.4*0.375+6.6*0.375+0.375*1
=0.375*(2.4+6.6+1)
=0.375*10
=3.75
4.2×4
＝（4+0.2）×4
＝4×4＋0.2x4
＝16＋0.8
＝16.8
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