8.12×6.8÷0.12×12.8运用五大运算定律
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/06 07:54:29
用6.8÷0.125=【6.8×8】÷【0.125×8】=74.4÷1=74.4
0.24×1.2×150=(0.24×30)×(1.2×5)=7.2×6=43.20.8×0.9÷0.8×0.9=(0.8÷0.8)×(0.9×0.9)=1×0.81=0.819.9×4.3=10×4
4.8÷0.12÷4=4.8÷(0.12x4)=4.8÷0.48=1079×1.25×0.8=79x1=7932×5.1+51×6.8=3.2x51+51x68=(3.2+6.8)x51=10x51=
5.1除0.3等于17
(111998×8.12+53175÷23×819971998)÷41148=(111998×20325+40675×32×819971998)×48203=(111998×20325+20325×8
.2÷3=0.40.48÷6=0.084.6÷23=0.214×0.5=76.8÷4=1.70.72÷12=0.060.7×1.1=0.770.72÷4=0.189.6÷6=1.6
4.设:客车速度为x货车速度为y;解方程:X:y=3:2x*0.5+y*0.5=20得x=24y=16答:客车的速度为16KM每小时再问:谢谢你的回答,请帮我把别的题也做了,谢谢配合再答:2,两种方式
减号前后的等式分别分拆为:(1+0.12+0.34)*(0.12+0.34+0.56)=(1+0.12+0.34)*(0.12+0.34)+(1+0.12+0.34)*0.56(1+0.12+0.34
1、6.8-1.36-0.64=6.8-(1.36+0.64)=6.8-2=4.82、457÷25÷4=457÷(25*4)=457÷100=4.573、(8700+870+87)÷87=(87*10
a*(b+0.56)-(a+0.56)*b=0.56a-0.56b=0.56*(a-b)=0.56这还有为什么吗就是为了运算过程能够简化
((1+1/1998)*8.12+(5+21/75)/2/3*(8+1997/1998))/(4+11/48)=3.793566177
等式的答案等于1,再问:简便算法再答:从左到右,先括号里面,再乘除,最后加减。少年好好学习啊,少用手机上网!
(1+0.12+0.34)x(0.12+0.34+0.56)-(1+0.12+0.34+0.56)x(0.12+0.34)=(0.34+0.56+0.12+0.34)x(0.12+0.34+0.56)
设0.12+0.23=x,0.12+0.23+0.34=y.则:(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)=(1+x)y
(1+0.12+0.23)X(0.12+0.23+0.34)-(1+0.12+0.23+0.34)X(0.12+0.23)=(0.12+0.23+0.34)+(0.12+0.23)×(0.12+0.2
2.4/0.12*6.6=132