4.86+2.4+5.14+6.6简便算法、脱式计算.怎样做?

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4.86+2.4+5.14+6.6简便算法、脱式计算.怎样做?4.86+2.4+5.14+6.6简便算法、脱式计算.怎样做?4.86+2.4+5.14+6.6简便算法、脱式计算.怎样做?简单算法:(4

4.86+2.4+5.14+6.6简便算法、脱式计算.怎样做?
4.86+2.4+5.14+6.6简便算法、脱式计算.怎样做?

4.86+2.4+5.14+6.6简便算法、脱式计算.怎样做?
简单算法:
(4.86+5.14)+(2.4+6.6)
=10+9
=19
脱式计算:
4.86+2.4+5.14+6.6
=7.26+5.14+6.6
=12.4+6.6
=19

简便的等我慢慢说:4.86+2.4+5.14+6.6 =(4.86+5.14)+(2.4+6.6) =10+9
=19 ...

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简便的等我慢慢说:4.86+2.4+5.14+6.6 =(4.86+5.14)+(2.4+6.6) =10+9
=19
脱式计算:
4.86+2.4+5.14+6.6
=7.26+5.14+6.6
=12.4+6.6
=19

收起

(4.86+5.14)+(2.4+6.6)
=10+9
=19