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電子課本網(wǎng) › 第58頁

第58頁

信息發(fā)布者：

分?jǐn)?shù)的分子和分母同時(shí)乘上或除以一個(gè)相同的數(shù)(0除外)，分?jǐn)?shù)的大小不變

$???\frac {1}{2}???$

$???\frac {2}{3}???$

$???\frac {3}{16}???$

$???\frac {3}{7}???$

$???\frac {2}{3}???$

$???\frac {12}{25}???$

$???\frac {1}{8}???$

$???\frac {3}{5}???$

$???\frac {1}{5}???$

$???\frac {7}{10}???$

③

?$\frac {15}{24}=\frac 58$?

?$\frac {6}{16}=\frac 38$?

?$\frac {15}{24}>\frac 6{16}$?

?$\frac {45}{80}=\frac 9{16}$?

?$\frac {26}{32}=\frac {13}{16}$?

?$\frac {45}{80}<\frac {26}{32}$?

?$\frac {10}{12}=\frac 56$?

?$\frac {25}{30}=\frac 56$?

?$\frac {10}{12}=\frac {25}{30}$?

?$\frac {12}{16}=\frac 34$?

?$\frac {15}{20}=\frac 34$?

?$\frac {12}{16}=\frac {15}{20}$?

分母為?$15$?的最簡(jiǎn)真分?jǐn)?shù)有

?$\frac 1{15}，$??$\frac 2{15}，$??$\frac 4{15}，$??$\frac 7{15}，$??$\frac 8{15}，$??$\frac {11}{15}，$??$\frac {13}{15}，$??$\frac {14}{15}$?

?$x+8$?可能為?$11，$??$13，$??$14$?

答：?$x$?可能為?$3，$??$5，$??$6。$?

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