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【OG20-P159-89题】
Which of the following fractions is closest to 12 ?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
4/7-1/2=1/14
5/9-1/2=1/18
6/11-1/2=1/22
7/13-1/2=1/26
9/16-1/2=1/16
追梦的猪猪
牢记:【作差】或【作商】比大小
Crystal8
牢记:最差做商比大小
Crystal8
妈呀,我把题目看成哪个数字最大了(虽然我选的答案也不是最大的
emily666
分子接近,选分母最大那个
Foca
这题答案是D吗?
独一无二的张喜喜回复Foca
是的
0
0
回复
2019-01-01 15:55:00
nicko
先观察ABCD都是分子比分母的一半多0.5
E比分母一半多1(可以排除E了)
ABCD随便拿出两个比较,发现分母越大的越接近。(其实从数学角度看当分母趋向无穷就是1/2了)
岛岛岛姐
7*0.5=3.5 4 9*0.5=4.5 5 11*0.5=5.5 6 13*0.5=6.5 7 16*0.5=8 9 分母越大越接近1/2 最后一个差了1 去除
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