13.8-5.9+6.2怎样简便计算

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13.8-5.9+6.2怎样简便计算
13.8-5.9+6.2怎样简便计算

13.8-5.9+6.2怎样简便计算
13.8-5.9+6.2
=(13.8+6.2)-(5.9+0.1)+0.1
=20-6+0.1
=14.1

13.8+6.2-5.9=14.1

先加6.2得到20再减去5.9得14.1

13.8-5.9+6.2
14-0.2+6-0.1+6+0.2=25.5

13.8-5.9+6.2
=13.8+6.2-5.9
=20-5.9
=14.1

13.8-5.9+6.2
=(13.8+6.2)-5.9
=20-(6-0.1)
=14+0.1
=14.1

先算头尾两个想加,再减中间那个

13.8+6.2-5.9=14.1