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3.28x37+64x32.8%3.28简便计算

3.28x37+6.4x32.8-3.28 =3.28×(37+64-1) =3.28×100 =3

37x28十37x73一37 =37×(28+73-1) =37×100 =3700

37x28+37x73一37 =37x(28+73-1) =37x100 =7300

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