947+(372-447)怎么简算

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947+(372-447)怎么简算
947+(372-447)怎么简算

947+(372-447)怎么简算
947+(372-447)
=947-447+372
=500+372
=872

947+(372-447)
=900+47+{372-(400+47)}
=900+47+372-400-47
=900-400+372+47-47
=500+372+0
=872

947+(372-447) =947-447+372 =500+372 =872