简算题怎么做
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/28 07:19:01
2/80+2/120+2/168+2/224
![简算题怎么做](/uploads/image/z/19292205-21-5.jpg?t=%E7%AE%80%E7%AE%97%E9%A2%98%E6%80%8E%E4%B9%88%E5%81%9A)
解题思路: 把分母分解质因数就会发现
解题过程:
2/80+2/120+2/168+2/224
=1/40+1/60+1/84/1/112
=1/20*2+1/20*3+1/28*3+1/28*4
=3/120+2/120+4/336+3/336
=5/120+7/336
=1/24+1/48
=3/48
=1/16
最终答案:略
解题过程:
2/80+2/120+2/168+2/224
=1/40+1/60+1/84/1/112
=1/20*2+1/20*3+1/28*3+1/28*4
=3/120+2/120+4/336+3/336
=5/120+7/336
=1/24+1/48
=3/48
=1/16
最终答案:略