www.whkt.net > 计算799=

计算799=

7856 - 799=7856 - (800 - 1)=7856 - 800+1=7056+1=7057

用简便方法计算799-(35-21),905-278799-(35-21)=799+21-35=820-35=785905-278=905-300+22=605+22=627

900-799加56

原式=799x(100-1)=799x100-799x1=79900-799=79101或者=(800-1)x(100-1)=800x100-800x1-1x100+1x1=80000-800-100+1=79200-100+1=79100+1=79101供参考.

1:可以看成,-795+795=0 然后再算799-793=62:或者,(799-795)+(795-793)=4+2=6

1896-799=1896-800+1=1096+1=1097

799+798+797+796+795+794+793+792=6364 如:799+798+797+796+795+794+793+792……+0 (799+1)*(800÷2)=320000 799到0数字一共800个,

799 +132用简便算法脱式计算解:799 +132=799+1+131=800+131=931

799*60=(800-1)*60=800*60-1*60=48000-60=47940

每组数字都加1取整,然后减去这串数字的组数即是答案,(7999+1)+(799+1)+(79+1)+(9+1)-(1*4)=8886

网站地图

All rights reserved Powered by www.whkt.net

copyright ©right 2010-2021。
www.whkt.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com