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3.75%【7.2÷4.5÷2】怎么简算

2.95

3.75+4.5÷1.8 =3.75+45/10÷18/10 =3.75+45/18 =3.75+5/2 =3.75+2.5 =6.25

(8.25-3.75)÷2.5÷4 =4.5÷(2.5×4) =4.5÷10 =0.45

(1)(2.5×45)÷(14×0.8)?0.75÷340,=2÷0.2-10,=10-10,=0;(2)1417×(223?34)+1112÷1721,=2117×2312+1112×2117,=(2312+1112)×2117,=3412×2117,=72;(3)718×4.5+3.75÷16.2×215,=1.75+154×233×115,=1.75+0.5,=2.25;(4)[1?(112+115...

=(3又3/4-8/15×4.5)÷14 =(3.75-2.4)÷14 =1.35÷14 =27/280

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