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電子課本網(wǎng) 第59頁

第59頁

信息發(fā)布者:
???$\frac {1}{7}$???
???$\frac {2}{3}$???
???$\frac {3}{5}$???
???$\frac {3}{10}$???
×
×
×
???$\frac {9}{5}$???
???$\frac {3}{5}$???
???$\frac {12}{5}$???
???$4\frac 34$???
???$\frac {1}{10}$???
???$\frac {1}{4}$???
??$40÷60=\frac 23$??
??$(60-40)÷60=\frac 13$??
??$答:已看頁數(shù)占總頁數(shù)的\frac 23,剩下的頁數(shù)占總頁數(shù)的\frac 13。$??
4
15
17
16
3×3×3×2= 54
4×3×3×2=72
??$答:原來這個(gè)分?jǐn)?shù)是\frac {54}{72}。$??