(20又9/4+12.25-31又30/1)除299+9(13又9/1-12.25)*1又31/5(过程详细点)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 20:32:29
![(20又9/4+12.25-31又30/1)除299+9(13又9/1-12.25)*1又31/5(过程详细点)](/uploads/image/z/197344-64-4.jpg?t=%EF%BC%8820%E5%8F%889%2F4%2B12.25-31%E5%8F%8830%2F1%29%E9%99%A4299%2B9%EF%BC%8813%E5%8F%889%2F1-12.25%EF%BC%89%2A1%E5%8F%8831%2F5%EF%BC%88%E8%BF%87%E7%A8%8B%E8%AF%A6%E7%BB%86%E7%82%B9%EF%BC%89)
(20又9/4+12.25-31又30/1)除299+9(13又9/1-12.25)*1又31/5(过程详细点)
(20又9/4+12.25-31又30/1)除299+9(13又9/1-12.25)*1又31/5(过程详细点)
(20又9/4+12.25-31又30/1)除299+9(13又9/1-12.25)*1又31/5(过程详细点)
(20又9/4+12.25-31又30/1)÷299+9(13又9/1-12.25)×1又31/5
=(9/184+4/49-30/931)×299/1+9(9/118-4/49)×31/36
=[(9×20)/(184×20)+(4×45)/(49×45)-(30×6)/(931×6)]×299/1+9[(9×4)/(118×4)-(4×9)/(49×9)]×31/36
=(180/3680+180/2205-180/5586)×299/1+9(36/472-36/441)×31/36
=180/(3680+2205-5586)×299/1+9×36/(472-441)×31/36
=180/299×299/1+9×36/31×31/36
=180/1+9
=9又180/1
最后结果等于9又180分之1