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115頁(yè)

第115頁(yè)

信息發(fā)布者：
?$=\frac {10}{12}-\frac {3}{12}+\frac {8}{12}$?
?$=\frac {5}{4}$?
?$=(\frac {7}{5}+\frac {3}{5})+(\frac {4}{9}+\frac {5}{9})$?
?$=2+1$?
?$=3$?
?$=\frac {13}{6}-\frac {7}{6}-\frac {6}{7}$?
?$=1-\frac {6}{7}$?
?$=\frac {1}{7}$?
?$=(\frac {7}{12}+\frac {5}{12})-(\frac {3}{8}+\frac {1}{8})$?
?$=1-\frac 12$?
?$=\frac {1}{2}$?
?$=20-2\frac {1}{2}-2\frac {1}{4}-2\frac {1}{8}-2\frac {1}{16}-2\frac {1}{32}-2\frac {1}{64}$?
?$=20-2×6-(\frac {1}{2}+\frac {1}{4}+\frac {1}{8}+\frac {1}{16}+\frac {1}{32}+\frac {1}{64})$?
?$=8-(1-\frac {1}{64})$?
?$=7\frac {1}{64}$?
$\begin {aligned}解：x&=\frac {3}{7}+\frac {3}{7}\\x &=\frac {6}{7}\end {aligned}$
$\begin {aligned}解：3x+8.5&=10\\3x&=1.5\\x &=0.5\end {aligned}$
$\begin {aligned}解：4.2x&=12.6\\x &=3\end {aligned}$
$\begin {aligned}解：8x&=20.4×2.4\\8x&=48.96\\x &=6.12\end {aligned}$
3.14×62÷2?3.14×(6÷2)2=28.26(平方厘米)
3.14×42÷2=25.12(平方厘米)
12.56
3

1
6
2
3
1
1
12
24
?$=1-\frac {1}{24}$?
?$=\frac {23}{24}$?
上一頁(yè) 下一頁(yè)