45.2-(32.4-18.5)怎样简便计算
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![45.2-(32.4-18.5)怎样简便计算](/uploads/image/z/372379-67-9.jpg?t=45.2-%2832.4-18.5%29%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
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45.2-(32.4-18.5)怎样简便计算
45.2-(32.4-18.5)怎样简便计算
45.2-(32.4-18.5)怎样简便计算
45.2-(32.4-18.5)
=45.2-32.4+18.5
=45-32+18+(0.2+0.5-0.4)
=31.3
45.2-(32.4-18.5)=45-(32-18)+0.2-(0.4-0.5)=31+0.3=31.3
45.2-(32.4-18.5)
=45.2+18.5-32.4
=63.7-32.4
=31.3