13.4*0.24+3.98的简便计算

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13.4*0.24+3.98的简便计算

13.4*0.24+3.98的简便计算
13.4*0.24+3.98的简便计算

13.4*0.24+3.98的简便计算
最简便的方法就是直接计算,
=3.216+3.98
=4.196

原式=13.4*0.24+4.02-0.04
=13.4*0.24+13.4*0.3-0.04
=13.4*0.54-0.04
=13.4*0.5+13.4*0.04-0.04
=13.4*0.5+12.4*0.04
=6.7+0.496
=7.196