《2025年暑假作业教育科学出版社五年级数学广西专版》

一、直接写得数。
$\frac {7}{8}+\frac {1}{2}= $ $\frac {1}{4}+\frac {1}{3}= $ $\frac {4}{5}-\frac {2}{3}= $
$1-\frac {4}{5}-\frac {1}{5}= $ $\frac {3}{7}+\frac {3}{7}= $ $\frac {2}{3}+\frac {4}{5}+\frac {1}{3}= $
$\frac {2}{9}+\frac {2}{9}= $ $\frac {1}{2}+\frac {1}{2}= $ $\frac {2}{15}+\frac {2}{15}= $

答案： $\frac{11}{8}$；$\frac{7}{12}$；$\frac{2}{15}$；0；$\frac{6}{7}$；$1\frac{4}{5}$；$\frac{4}{9}$；1；$\frac{4}{15}$

二、计算下面各题,并验算。
$\frac {5}{6}-\frac {5}{9}$ $\frac {3}{4}+\frac {1}{5}$ $\frac {6}{7}-\frac {1}{5}$

答案： $\frac{5}{6}-\frac{5}{9}=\frac{15}{18}-\frac{10}{18}=\frac{5}{18}$，验算：$\frac{5}{18}+\frac{5}{9}=\frac{5}{18}+\frac{10}{18}=\frac{15}{18}=\frac{5}{6}$；
$\frac{3}{4}+\frac{1}{5}=\frac{15}{20}+\frac{4}{20}=\frac{19}{20}$，验算：$\frac{19}{20}-\frac{1}{5}=\frac{19}{20}-\frac{4}{20}=\frac{15}{20}=\frac{3}{4}$；
$\frac{6}{7}-\frac{1}{5}=\frac{30}{35}-\frac{7}{35}=\frac{23}{35}$，验算：$\frac{23}{35}+\frac{1}{5}=\frac{23}{35}+\frac{7}{35}=\frac{30}{35}=\frac{6}{7}$。

三、计算下列各题,能简算的要简算。
$\frac {4}{5}-\frac {3}{10}+\frac {1}{5}$ $\frac {24}{25}+\frac {4}{13}+\frac {5}{13}+\frac {4}{13}$ $3-(\frac {4}{11}-\frac {7}{11})$
$10-(\frac {2}{3}+\frac {1}{2})$ $\frac {4}{5}-\frac {1}{6}+\frac {1}{3}$ $1-(\frac {1}{2}+\frac {1}{7})$
$\frac {3}{5}+\frac {1}{4}-\frac {2}{5}$ $1\frac {1}{2}-(\frac {4}{11}-\frac {7}{11})$ $\frac {5}{2}-(\frac {1}{4}+\frac {1}{3})$

答案： 1. $\frac{7}{10}$
2. $1\frac{24}{25}$
3. $3\frac{3}{11}$
4. $8\frac{5}{6}$
5. $\frac{29}{30}$
6. $\frac{5}{14}$
7. $\frac{9}{20}$
8. $1\frac{17}{22}$
9. $1\frac{11}{12}$