ldcf.net
当前位置:首页 >> 脱式计算(能简便算的要简算,写出主要步骤)①13.6... >>

脱式计算(能简便算的要简算,写出主要步骤)①13.6...

(1)13.6-2.8+7.4-7.2=(13.6+7.4)-(2.8+7.2)=21-10=11;(2)817÷23+123×917+123=(817+917+1)×123=2×123=223;(3)(12+13)÷35-1718 =56÷35-1718 =2518-1718=49;(4)(14-0.1÷2)×513+1213=(14-0.05)×513+1213=15×513+1213=113+121...

2-6/13÷9/29-2/3 解:根据约分和通分的运用, 原式=2-6/13÷9/29-2/3 =2-6/13x29/9-2/3 =2-58/39-2/3 =2-1-19/39-26/39 =1-45/39 =-6/39 =-2/13

13.6+1.4÷(18.2-17.8)=13.6+1.4÷0.4=13.6+3.5=17.10.72÷[3.6×(0.51-0.49)]=0.72÷[3.6×0.02]=0.72÷0.072=10 10.01×12.6-12.6×0.01=126.126-0.126=12610.9×3.23-3.23=35.207-3.23=31.977

(1)13.6×3-40.6÷2,=40.8-20.3,=20.5;(2) 99×0.75+ 1 4 ×99 ,=99×(0.75+0.25),=99×1,=99;(3) ( 5 6 - 5 8 )×24 ,= 5 6 ×24- 5 8 ×24,=20-15,=5;(4) 121×100 1 121 ,=121×(100+ 1 121 ),=121×100+121× 1 121 ,=12100+1...

8/13*1/7+1/7*6/13=1/7(8/13+6/13)=2/13

(1)12.56-6.64-3.36 =12.56-(6.64+3.36)=12.56-10=2.56;(2)45.5-(0.98+5.5)=45.5-5.5-0.98=40-0.98=39.02;(3)13.6+7.94+6.4=13.6+6.4+7.94=20+7.94=27.94;(4)10+0.009+0.191=10+(0.009+0.191)=10+0.2=10.2;(5)15-3.7-4.64=1...

(1)(45+14)÷73+710,=2120÷73+710,=920+1420,=2320;(2)519×14+1319×14,=(519+1319)×14,=1819×14,=938;(3)7.6×35%+6.5×0.76,=7.6×0.35+0.65×7.6,=7.6×(0.35+0.65),=7.6×1,=7.6;(4)1349×21+13×2849,=2149×13+13×2849,...

解: 47/6*(39/10)+13/6*3.9 =47/6*3.9+13/6*3.9 =(47/6+13/6)*3.9 =60/6 *3.9 =10*3.9 =39

4/11-6/13+7/9*(9/11-9/13) =4/11-6/13+7/9x9/11-7/9x9/13 =4/11-6/13+7/11-7/13 =(4/11+7/11)-(6/13+7/13)......加法交换律和连减的简便计算 =1-1 =0 [1-(1/10+1/12+1/15)*2]/1/15 =[1-(1/10+1/12+1/15)*2]x15 =[1-(1/5+1/6+2/15)]x15 =1x15-1/...

1、用竖式计算 0.396÷1.2= 0.756÷0.36= 15.6×13= 0.18×15= 0.025×14= 3.06×36= 0.04×0.12= 3.84×2.6≈ 5.76×3= (保留一位小数) 7.15×22 90.75÷3.3 3.68×0.25 16.9÷0.13 1.55÷3.9 3.7×0.016 13.76×0.8= 5.2×0.6 8.4×1.3 6.4×0.5 4.48×0.4 5.25...

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com