|
问题：【简便运算17.48+3.17-(2.48-6.83)3.6*11.1+1.2*66.7【*代表乘号】12.8*34.5+12.8*12.3+46.8*87.27.2*14.5+17*2.8【84/3】-.35+(【14/1】-【620/13】）注意；【84/3】等于8又4分之3.全部都是这样】
答案：↓↓↓ 潘国强的回答： 网友采纳 7.48+3.17-(2.48-6.83) =7.48+3.17-2.48+6.83 =（7.48-2.48）+（3.17+6.83） =5+10 =15 3.6*11.1+1.2*66.7 =1.2*3*11.1+1.2*66.7 =1.2*33.3+1.2*66.7 =1.2*(33.3+66.7) =1.2*100 =120 12.8*34.5+12.8*12.3+46.8*87.2 =12.8*(34.5+12.3)+46.8*87.2 =12.8*46.8+46.8*87.2 =46.8*(12.8+87.2) =46.8*100 =4680 问题补充： 7.2*14.5+17*2.8 =7.2*（17-2.5）+17*2.8 =7.8*17-72*0.25+17*2.8 =17*（7.8+2.8）-72÷4 =17*10-18 =170-18 =152 【84/3】-.35+(【14/1】-【620/13】） =8.75-.35+1.25-6.65 =(8.75+1.25)-(6.65+0.35) =10-7 =3 | 
