五升六分数、小数及百分数的互化.docx

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1、除法除不尽（按四舍五入计算）除法比分数小数百分除法比分数小数百分121:21/20.550%131:31/303333%141:41/40.2525%232:32/30.6767%151:51/50.220%161:61/60.1717%252:52/50.440%565:65/60.8383%353:53/50.660%171:71/70.1414%454:54/50.880%272:72/70.2929%181:81/80.12512.5%373:73/70.4343%383:83/8037537.5%474:74/70.5757%585:85/80.62562.5%575:75/70.7

2、171%787:87/80.87587.5%676:76/70.8686%1101:101/100.110%191:91/90.1111%31O3:103/100330%292:92/90.2222%7107:107/100.770%494:94/90.4444%9109:109/100.990%595:95/90.5656%323:23/21.5150%797:97/907878%545:45/41.25125%898:98/90.8989%757:57/51.4140%434:34/31.33133%备注除尽是指除数（前项、分子）除以除数（后项、分母）得商不出现循环（或无限循环）小数;除不尽与除尽相反，是无限循环小数。