六年级数学:分数混合简便运算.很急!今晚就要用的!麻烦快一点好吗?1/7×6/13+8/13×1/7=? 2-5/11÷9/22-5/9=? (5/6-3/4)÷5/12+9/5=?把过程也写出来啊~~在线等待、、谢了!
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/08 23:59:40
六年级数学:分数混合简便运算.很急!今晚就要用的!麻烦快一点好吗?1/7×6/13+8/13×1/7=? 2-5/11÷9/22-5/9=? (5/6-3/4)÷5/12+9/5=?把过程也写出来啊~~在线等待、、谢了!
六年级数学:分数混合简便运算.很急!今晚就要用的!麻烦快一点好吗?
1/7×6/13+8/13×1/7=? 2-5/11÷9/22-5/9=? (5/6-3/4)÷5/12+9/5=?
把过程也写出来啊~~在线等待、、谢了!
六年级数学:分数混合简便运算.很急!今晚就要用的!麻烦快一点好吗?1/7×6/13+8/13×1/7=? 2-5/11÷9/22-5/9=? (5/6-3/4)÷5/12+9/5=?把过程也写出来啊~~在线等待、、谢了!
1/7×6/13+8/13×1/7=(6/13 + 8/13) X 1/7 = 14/13 x 1/7 = 2/13
2-5/11÷9/22-5/9= 2 - 5/11 * 22/9 - 5/9 = 2- (5*22)/(9*11) - 5/9
= 2 - 5/9( 22/11 + 1) = 2 - 5/9 * 3 = 2- 5/3 = 1/3
(5/6-3/4)÷5/12+9/5=?
=(5/6 - 3/4)* 12/5 + 9/5
=((5/6 - 3/4)*12 + 9)/5
=(5/6 * 12 - 3/4 * 12 + 9) /5
=(10-9+9)/5 = 2