98除以9约竽于几算法

\u7b80\u4fbf\u7b97\u6cd53/4\u00d713/15+1/4\u00d713/15\u3001\uff081/2+1/3\uff09\u00d73/5\u30016\u9664\u4ee59+2/3\u00d798\u3001\uff087/16\u00d71/4\uff09\u00d78\u9664\u4ee51/6

3/4\u00d713/15+1/4\u00d713/15
=\uff083/4+1/4\uff09\u00d713/15
=1\u00d713/15
=13/15
\uff081/2+1/3\uff09\u00d73/5
=1/2\u00d73/5+1/3\u00d73/5
=3/10+1/5
=1/2
6\u00f79+2/3\u00d798
=2/3+2/3\u00d798
=2/3\u00d7\uff081+98\uff09
=2/3\u00d799
=66
\uff087/16\u00d71/4\uff09\u00d78\u9664\u4ee51/6
=7/64\u00d78\u00d76
=7/8\u00d76
=21/4
=5.25

\u5316\u7b80\u6bd4\u5e76\u6c42\u6bd4\u503c\uff1a
5/16:1/4=5/16\u00d74=5:4
4.2:0.8=42:8=21:4
3/5:12.2=6:122=3:61

9.87/0.987/7.2=10/7.2=25/18\u3002

98/9
=(99-1)/9
=11-1/9
1/9<1/2
11-1/9>11-1/2
所以98/9约等于11.

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