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18頁

第18頁

信息發(fā)布者:

C
B
5
0
0
?$=(7-7)+(23-21)$?
?$=0+2$?
?$=2$?
?$=(12-12)+(11-8-2)$?
?$=0+1$?
?$=1$?
?$=\frac {1}{8}+2 \frac {1}{4}-2 \frac {1}{8}-\frac {1}{4}$?
?$=-(2 \frac {1}{8}-\frac {1}{8})+(2 \frac {1}{4}-\frac {1}{4})$?
?$=-2+2$?
?$=0$?
?$=-(13 \frac {1}{5}-4 \frac {1}{5})+(\frac {5}{6}-\frac {5}{6})$?
?$=-9+0$?
?$=-9$?
?$=-2\frac {1}{3}+(-0.5)+\frac {1}{3}$?
?$=-2+(-0.5)$?
?$= -2.5$?
?$=(3\frac {1}{4}+5\frac {3}{4})-(2\frac {3}{5}+8\frac {2}{5})$?
?$=9-11$?
?$=-2$?
?$=[\frac {1}{8}+(-3\frac {1}{8})]+(3\frac {1}{4}-\frac {1}{4})+11\frac {2}{3}$?
?$= -3+3+11\frac {2}{3}$?
?$=11\frac {2}{3}$?