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2.25x4.8+77.5x0.48简便计算

2.25x4.8+77.5x0.48 =2.25x4.8+7.75x4.8 =4.8x(2.25...

转化成22.5×0.48+77.5×0.48 =0.48×(22.5+77....

2.25x4.8+89.5x0.48-12x0.48=(2.25+8.95-1.2)x4.8=48

变成2.25x1.8+7.75x1.8 再变成(2.25+7.75)x1.8再计算10x1.8=18

2.25x1.8+12.5x0.18=2.25x1.8+1.25x1.8=1.8x(2.25+1.2...

圆x2+y2-10x-10y=0 ==> (x2-10x+25)+(y2-10y+25)=50...

225x0.46+22.5x6.4-2.25x1.25x8 =225x0.46+225x0.64-...

=25x(103+13+85) =25×(200+1) =25×200+25×1 =5000+25 ...

2.25x37.9+12.5x2.15+125x0.206 =2.25x37.9+12.5x(2....

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