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25 39+25简便计算

25*39+25=25*(39+1)=25*40=1000

25x39+25=25x(39+1)=25x40=1000

=25x(39+1)-25 =25x40-25=1000-25=975

展开全部二五*39加25的简便计算=25x(39+1)=25x40=1000

25*39=25*(40-1)=25*40-25*1=1000-25=975

合并同类项,25+25乘以39=25乘以(1+39)=25乘以40=1000.

39*25+39=39*26=(40-1)*26=1040-26=1014

一、39x25+25x25 =(39+25)x25 =64x25 =16x(4x25) =16x100 =1600 二、39x25+25x25 =(39+25)x25 =64x25 =8x(8x25) =8x200 =1600 三、39x25+25x25 =(40-1)x25+625 =1000-25+625 =1600

25十39x25=(1十39)x25=40x25=1000

=25x40-25x2=1000-50=950

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