sppk.net
当前位置:首页 >> 301x12简便算法 >>

301x12简便算法

12x301=12x(300+1)=3612

301/12-12 =25又1/12-12 =13又1/12 =157/12

(1)301*79,=(300+1)*79,=300*79+1*79,=23700+79,=23779;(2)125*72*4,=(125*4)*72,=500*72,=36000;(3)728*79十272*79,=79*(728+272),=79*1000,=79000;(4)8.59+2.57+3.43+5.47,=8.59+(2.57+3.43)+5.47,=8.59+6+5.47,=20.06;(5)49.62+27.17-19.62,=49.62-19.62+27.17,=30+27.17,=57.17;(6)1546-(546-239),=1546-546+239,=1000+239,=1239.

301的简便计算要过程301=(300+1)=300+2*300*1+1=90000+600+1=90601.

300*79在加79

301x23的简便计算: 301x23 =(300+1)*23 =300*23+1*23 =6900+23 =6923

21*199=21*(200-1)=4200-42=415812*301=12*(300+1)=3600+12=3612

301X109=300X109+1X109=32700+109=32809

301*101=(300+1)*101=300*101+101=300*(100+1)+100+1=30000+300+100+1=30401祝你学习天天向上,加油!!!!!!!

301x199=301x200 -301=60200-301=59899

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