46.7-38.2+33.3-1.8怎样简便计算?
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![46.7-38.2+33.3-1.8怎样简便计算?](/uploads/image/z/655838-62-8.jpg?t=46.7-38.2%2B33.3-1.8%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%3F)
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46.7-38.2+33.3-1.8怎样简便计算?
46.7-38.2+33.3-1.8怎样简便计算?
46.7-38.2+33.3-1.8怎样简便计算?
46.7-38.2+33.3-1.8
=46.7+33.3-38.2-1.8
=(46.7+33.3)-(38.2+1.8)
=80-40
=40
正数与正数一合,负数与负数一合,然后再做合。
46.7+33.3=80……①
-38.2-1.8=-40……②
①+②=40