電子課本網(wǎng) › 第82頁(yè)

第82頁(yè)

信息發(fā)布者：

C

D

1

$\frac{11}{7}$

$\frac{11}{15}$

$\frac{6}{5}$

$\frac{2}{9}$

$\frac{3}{16}$

解?$：x=\frac {3}{2}-\frac {2}{5}$?

?$x = \frac {11}{10}$?

解?$：x=\frac {5}{12}+\frac {3}{8}$?

$x = \frac{19}{24}$

解?$：x=\frac {11}{12}-\frac {3}{5}$?

$x = \frac{19}{60}$

解?$：x=\frac {2}{3}-\frac {1}{5}$?

$x = \frac{7}{15}$

?$=\frac {21}{24}+\frac {8}{24}+\frac {18}{24}$?

?$=\frac {29}{24}+\frac {18}{24}$?

?$= \frac {47}{24}$?

?$=\frac {48}{50}-\frac {15}{50}-\frac {10}{50}$?

?$=\frac {33}{50}-\frac {10}{50}$?

?$= \frac {23}{50}$?

?$=\frac {28}{48}+\frac {9}{48}$?

?$= \frac {37}{48}$?

?$=\frac {16}{18}+\frac {3}{18}$?

= $\frac{19}{18}$

?$=(\frac {3}{4}+\frac {1}{4})+(\frac {7}{9}+\frac {1}{9})$?

?$=1+\frac {8}{9}$?

?$= 1\frac {8}{9}$?

?$=\frac {19}{11}-\frac {8}{11}+\frac {2}{3}$?

?$=1+\frac {2}{3}$?

= $1\frac{2}{3}$

?$=\frac {13}{12}-(\frac {5}{6}+\frac {1}{6})$?

?$=\frac {13}{12}-1$?

?$= \frac {1}{12}$?

?$=(\frac {6}{13}+\frac {7}{13})-(\frac {3}{7}+\frac {4}{7})$?

?$=1-1$?

?$= 0$?

第一個(gè)月繡了整幅作品的?$\frac {2}{5}，$?

第二個(gè)月繡了整幅作品的?$\frac {1}{2}。$?

兩個(gè)月一共繡的：?$\frac {2}{5}+\frac {1}{2}=\frac {4}{10}+\frac {5}{10}=\frac {9}{10}$?

還剩下的：?$1 - \frac {9}{10}=\frac {1}{10}$?

答?$：$?兩個(gè)月一共繡了整幅作品的?$\frac {9}{10}，$?還剩下?$\frac {1}{10}$?沒繡。

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