零五网 › 全部参考答案› 实验班提优训练答案 › 江苏版实验班提优训练数学五年级上下册答案 › 第22页

第22页

信息发布者：

$\dfrac{11}{7}$

$\dfrac{11}{15}$

$\dfrac{6}{5}$

$\dfrac{2}{9}$

$\dfrac{3}{16}$

 $\begin{aligned}解：x&=\dfrac{3}{2}-\dfrac{2}{5}\\x&=\dfrac{15}{10}-\dfrac{4}{10}\\x&=\dfrac{11}{10}\end{aligned}$

 $\begin{aligned}解：x&=\dfrac{3}{8}+\dfrac{5}{12}\\x&=\dfrac{9}{24}+\dfrac{10}{24}\\x&=\dfrac{19}{24}\end{aligned}$

 $\begin{aligned}解：x&=\dfrac{11}{12}-\dfrac{3}{5}\\x&=\dfrac{55}{60}-\dfrac{36}{60}\\x&=\dfrac{19}{60}\end{aligned}$

 $\begin{aligned}解：x&=\dfrac{2}{3}-\dfrac{1}{5}\\x&=\dfrac{10}{15}-\dfrac{3}{15}\\x&=\dfrac{7}{15}\end{aligned}$

$=\dfrac{21}{24}+\dfrac{8}{24}+\dfrac{18}{24}$

$=\dfrac{47}{24}$

$=\dfrac{48}{50}-\dfrac{15}{50}-\dfrac{10}{50}$

$=\dfrac{23}{50}$

$=\dfrac{28}{48}+(\dfrac{30}{48}-\dfrac{21}{48})$

$=\dfrac{28}{48}+\dfrac{9}{48}$

$=\dfrac{37}{48}$

 $=\dfrac{16}{18}+(\dfrac{12}{18}-\dfrac{9}{18})$

 $=\dfrac{16}{18}+\dfrac{3}{18}$

 $=\dfrac{19}{18}$