2.72-3.98+5.28-2.02怎么简便计算急!

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2.72-3.98+5.28-2.02怎么简便计算急!
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2.72-3.98+5.28-2.02怎么简便计算急!
2.72-3.98+5.28-2.02怎么简便计算急!

2.72-3.98+5.28-2.02怎么简便计算急!
=2.72+5.28-(3.98+2.02)
=8-6
=2

(2.72+5.28)-(3.98+2.02)

2.72-3.98+5.28-2.02
=(2.72+5.28)-(3.98+2.02)
=8-6
=2