www.ndwl.net > 663÷7+337×7怎么简便计算

663÷7+337×7怎么简便计算

663÷7-663×7+663×7+337×7 =663×(1/7-7)+1000×7

(1)337-298=337-300+2,=37+2,=39;(2)0.8-0.2×1.9÷7.6=0.8-0.38÷7.6.=0.8-0.05,=0.75;(3) 7 13 ÷8+ 1 8 × 5 13 = 7 13 × 1 8 + 1 8 × 5 13 ,=( 7 13 + 5 13 )× 1 8 ,= 12 13 × 1 8 ,= 3 26 ;(4) 6 7 -( 4 5 - 1 7 ) = 6 7 +...

网站地图

All rights reserved Powered by www.ndwl.net

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