ldcf.net
当前位置:首页 >> 2.4÷x十2.8=1.2 >>

2.4÷x十2.8=1.2

2.8十1.2x=5.2 1.2x=5.2-2.8 x=2.4÷1.2 x=2

1.2x=2.8一0.4 1.2x=2.4 x=2.4÷1.2 x=2

原式 =1.2+1.4+1.6+1.8+2.0+2.2+2.4+2.6+2.8+3.0 =(1.2+3.0)x10÷2 =4.2x10÷2 =42÷2 =21 或者 =(1.2+2.8)+(1.4+2.6)+(1.6+2.4)+(1.8+2.2)+(2.0+3.0) =4+4+4+4+5 =4x4+5 =16+5 =21 供参考。

1.2x+2.8=7.6 1.2x=7.6-2.8 1.2x=4.8 x=4

5.6×2.4÷2.8÷1.2=5.6×2.4×1/2.8×1/1.2=5.6×1/2.8×2.4×1/1.2=2×2=4

2.8十7.2÷1.2x0.7简便计算 2.8十7.2÷1.2x0.7 =2.8+6×0.7 =2.8+4.2 =7 直接算最简便

1.2x+2.8x=10.4 解:4x=10.4 x=10.4÷4 x=2.6

2.8减1.2x等于0.4 解:1.2x=2.8-0.4 1.2x=2.4 x=2 行家正解,不明白可以追问!祝您学习进步 满意请点击下面的【选为满意回答】按钮,O(∩_∩)O谢谢

原式=1/4*(2.8+4.4)*1.2 将1/4带入括号里,则有 (2.8/4+4.4/4)*1.2=(0.7+1.1)*6/5=0.96

1.2: 2.8的比值是12:28=3: 7 答案: ( 3/7 ) 望采纳

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