12.5*(8+0.4)+25 巧算

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12.5*(8+0.4)+25巧算12.5*(8+0.4)+25巧算12.5*(8+0.4)+25巧算12.5*(8+0.4)+25=12.5x8+12.5x0.4+25=100+5+25=13012

12.5*(8+0.4)+25 巧算
12.5*(8+0.4)+25 巧算

12.5*(8+0.4)+25 巧算
12.5*(8+0.4)+25
=12.5x8+12.5x0.4+25
=100+5+25
=130

12.5*8+12.5*0.4+12.5*2=130

12.5*(8+0.4)+25
=12.5x8+12.5x0.4+25
=100+5+25
=130