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(225÷15+45)÷5怎样递等式来计算

解 (225÷15+45)÷5 =(15+45)÷5 =60÷5 =12

=(15+45)÷5 =60÷5 =12

①14÷(1-13),=14×32,=38;②75×0.5+15÷2,=7.5×5+7.5,=7.5×(5+1),=7.5×6,=45;③45-8×332,=1620-1520,=120;④(13-15)×45,=13×45?15×45,=15-9,=6;

45×1.58+5.5×15.8 =4.5*15.8+5.5*15.8 =(4.5+5.5)*15.8 =10*15.8 =158

2001360003,你好: 45÷(2/5÷1/15) =45÷2/5×1/15 =45×5/2×1/15 =3×5/2 =15/2

4又25分之8-15分之7×5分之3÷45分之7 =108/25-7/15×3/5×45/7 =108/25-9/5 =108/25-45/25 =63/25 =2又13/25 数学辅导团为您解答,不理解请追问,理解请及时选为满意回答!(*^__^*)谢谢!

(100+100)÷(60-45)×60 =200X60÷15 =200X4 =800

5+10+15+20+...+45 =(5+45)×9÷2 =50×9÷2 =450÷2 =225

(1)4÷45-45÷4,=4×54-45×14,=5-15,=245;(2)105×13-270÷18 =1365-15,=1350; (3)13÷[(23+15)×113],=13÷[(1015+315)×113],=13÷[1315×113],=13÷115,=13×15,=5.

45.55-(6.82+15.55) =45.55-15.55-6.82 =30-6.82 =23.18

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