101×168+99×22

分类: 作业答案 • 2022-01-09 18:02:27

问题描述：

101×168+99×22
1.99+19.99+199.9+1999
两道简算题.
记得要简算过程、、、

答

101×168+99×22=(100+1)×168+(100-1)×22=100×168+100×22+168-22=100×(168+22)+146=100×190+146=19000+146=191461.99+19.99+199.9+1999=(2-0.01)+(20-0.01)+(200-0.1)+(2000-1)=2+20+200+2000-1-0.1-0.01-0.01...

FeS的电离中c(Fe+)*c(s2-)=6.25*10^-18,又知溶液中,[c(H+)]^2*c(S2-)=1*10^-22现将适量的FeS,投入饱和溶液中,要使溶液的c(Fe2+)达到1mol/L,应调节溶液的PH为多少?
520除以一个数，商23余14，则除数是（　　）A. 23B. 22C. 21D. 20
英语翻译The folks in Arkansas are serious about getting you your money -- if you're entitled to it.Last year,that unclaimed treasure trove of everything from cash to diamonds and guns was valued at $22 million.
小明把棱长为4的正方体分割成了29个棱长为整数的小正方体，则其中棱长为1的小正方体有（　　）A. 22个B. 23个C. 24个D. 25个
520除以一个数，商23余14，则除数是（　　）A. 23B. 22C. 21D. 20
1.圆锥的母线长为L,高为1/2L,则过圆锥顶点的最大截面的面积是（）2.用两个平行平面截半径为5的球,所得圆面的周长分别为6π和8π,则这两个截面之间的距离为____3.将一个边长为10的大正方体的表面涂成红色后,再切成边长为1的小正方体,这些小正方体中至少有一面涂成红色的个数是4.长方体的表面积是22.所得棱长的和为24,则对角线长为________5.用一个平行于圆锥底面的平面截这个圆锥,截得的这个圆台上、下底面的半径是1:4.,截去的圆锥的母线长为3cm,求截得的圆台的母线长.
Section A Directions:阅读Mary和Tim之间对话的下一部分,选择will或to be going to将对话补充完整Tim:Did you do all your job?Mary:Almost.Dave spoke to his dad.21 (We’ll / We’re going to) borrow his van.I’ve booked a hotel.22 (We’ll / We’re going to) stop at the hotel on the way to the gig to collect the keys,because we’ll be very late that night.Tim:What about feeding your cats?Mary:Oh no!I completely forgot!23 (I’ll/I’m going to) ask the neighbor.Tim:Don’t worry.24 (I’ll/I’m go
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计算下面各题能简算的要简算．672-36-64 26×76+26×24 98+265+20299×26 32×125×25 576-（176+280）32×101-32 89×99+89 1050÷15÷7．
求《西游记》5篇读后感?
they go to the airport by taxi.同义句转换.they====a taxi === the airport.小影急用纳,快捏

101×168+99×22

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