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3.5x97+0.38x35,,,,,,,怎么简便就怎样算!...

0.35x97+3.5x0.2 +0.35 =0.35x97+0.35x2+0.35 =0.35x(97+2+1) =0.35x100 =35

97×(35+65)=97×100=9700

2.97×35 =(3-0.03)×35 =3×35-0.03×35 =105-1.35 =104.65

25x97+35x3 =25x97+(25+10)x3 =25x97+25x3+10x3 =25x(97+3)+30 =2500+30 =2530

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