4.38-1.56+0.62-0.44用简便算法计栓

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4.38-1.56+0.62-0.44用简便算法计栓4.38-1.56+0.62-0.44用简便算法计栓4.38-1.56+0.62-0.44用简便算法计栓4.38-1.56+0.62-0.44=(4

4.38-1.56+0.62-0.44用简便算法计栓
4.38-1.56+0.62-0.44用简便算法计栓

4.38-1.56+0.62-0.44用简便算法计栓
4.38-1.56+0.62-0.44=(4.38+0.62)-(1.56+0.44)=5-2=3

4.38-1.56+0.62-0.44
=(4.38+0.62)-(0.44+1.56)
=5-2
=3

题目=(4.38+0.62)-(1.56+0.44)=5-2=3

用凑整的方法:
4.38-1.56+0.62-0.44
=(4.38+0.62)-(1.56+0.44)
=5-2
=3