17-31.2/(8.2-3.4)怎样简便计算?
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17-31.2/(8.2-3.4)怎样简便计算?17-31.2/(8.2-3.4)怎样简便计算?17-31.2/(8.2-3.4)怎样简便计算?17-31.2/(8.2-3.4)=17-31.2/4.
17-31.2/(8.2-3.4)怎样简便计算?
17-31.2/(8.2-3.4)怎样简便计算?
17-31.2/(8.2-3.4)怎样简便计算?
17-31.2/(8.2-3.4)=17-31.2/4.8=17-6.5=10.5