9.7-3.79+1.3-6.21 怎样简便计算?

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9.7-3.79+1.3-6.21 怎样简便计算?
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9.7-3.79+1.3-6.21 怎样简便计算?
9.7-3.79+1.3-6.21 怎样简便计算?

9.7-3.79+1.3-6.21 怎样简便计算?
(9.7+1.3)-(3.79+6.21)
=11-10
=1

(9.7+1.3)-(3.79+6.21)=11-10=1

9.7-3.79+1.3-6.21
=(9.7+1.3)-(3.79+6.21)
=11-10
=1