亚洲激情+欧美激情,无码任你躁久久久久久,我的极品美女老婆,性欧美牲交在线视频,亚洲av高清在线一区二区三区

電子課本網(wǎng) 第107頁

第107頁

信息發(fā)布者:
$\frac{1}{2}$
$\frac{3}{7}$
$\frac{3}{10}$
$\frac{2}{7}$
$\frac{2}{7}$
4
$\frac{7}{10}$
$1\frac{2}{3}$
?$=(\frac {5}{8}+\frac {3}{8})+(\frac {7}{11}+\frac {4}{11})$?
?$=1+1$?
?$=2$?
?$=4 ×\frac {9}{4}-\frac {4}{9} ×\frac {1}{4}$?
?$=9-\frac {1}{9}$?
?$=8 \frac {8}{9}$?
?$=\frac {5}{9} ×\frac {1}{6}+\frac {4}{9} ×\frac {1}{6}$?
?$=(\frac {5}{9}+\frac {4}{9}) ×\frac {1}{6}$?
?$=\frac {1}{6}$?
48
300
3.2
6
27
5
6
5
54
27
50
50
20
75
5
?$=(54 \div 9):(45 \div 9)$?
?$=6: 5$?
?$=\frac 65$?
?$=(\frac {1}{2} ×16):(\frac {1}{16} ×16)$?
?$=8: 1$?
?$=8$?
?$=36$?:?$90$?
?$=2: 5$?
?$=\frac 25$?
?$=\frac {68 \div 17}{51 \div 17}$?
?$=4$?:?$3$?
?$=\frac {4}{3}$?