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3.7x5.4+0.37x46简便运算

3.7x5.4+0.37x46 =3.7x5.4+3.7x4.6 =3.7x(5.4+4.6) =3.7x10 =37

题中少了一个加号。 4.6×3.7+46×0.63 =46×0.37+46×0.63 =46×(0.37+0.63) =46×1 =46

46*3.27+5.4*32.7 =4.6x32.7+5.4x32.7 =32.7x(4.6+5.4) =32.7x10 =327 现有浓度为20%的糖水300克,要把它变成浓度为40%的糖水,需加糖多少克?(比例解) 需加糖X克,因为一定要用比例解,所以列比例如下: (X+300):(1-20%)=300:(1-40%)...

原式 =3.7x5.4+0.37x46 =3.7x5.4+3.7x4.6 =3.7x(5.4+4.6) =3.7x10 =37 供参考。

解:原式=4.6x2.7+46x0.73 =4.6x2.7+4.6x10x0.73 =4.6x2.7+4.6x7.3 =4.6x(2.7+7.3) =4.6x10 =46 答:答案是46.

46·8X0·53十4·68x4·7 =4.68*5.3+4.68*4.7 =4.68*(5.3+4.7) =4.68*10 =46.8

1题259+7x=560 7x=301 x=43 2题36+3x=46+x 3x-x=46-36 2x=10 x=5 不懂可追问,有帮助请采纳,谢谢!

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