《2025年一本暑假计算加应用题五年级数学北师大版》

1. 直接写出得数。(每题1★)
$\frac {1}{7}×\frac {4}{5}=$$\frac{4}{35}$ $\frac {2}{5}×\frac {1}{5}=$$\frac{2}{25}$ $\frac {1}{4}×\frac {1}{6}=$$\frac{1}{24}$ $\frac {2}{11}×\frac {2}{3}=$$\frac{4}{33}$
$\frac {4}{5}×\frac {4}{5}=$$\frac{16}{25}$ $\frac {3}{7}×\frac {1}{2}=$$\frac{3}{14}$ $\frac {1}{2}×\frac {1}{5}=$$\frac{1}{10}$ $\frac {1}{7}×\frac {5}{6}=$$\frac{5}{42}$
$\frac {8}{19}×\frac {5}{8}=$$\frac{5}{19}$ $\frac {3}{7}×\frac {5}{6}=$$\frac{5}{14}$ $\frac {2}{13}×\frac {1}{2}=$$\frac{1}{13}$ $\frac {6}{7}×\frac {7}{13}=$$\frac{6}{13}$
$\frac {4}{5}×\frac {3}{8}=$$\frac{3}{10}$ $\frac {2}{3}×\frac {9}{10}=$$\frac{3}{5}$ $\frac {5}{14}×\frac {7}{15}=$$\frac{1}{6}$ $\frac {5}{7}×\frac {14}{15}=$$\frac{2}{3}$
$\frac {13}{22}×\frac {11}{39}=$$\frac{1}{6}$ $\frac {5}{21}×\frac {7}{25}=$$\frac{1}{15}$ $\frac {5}{9}×\frac {21}{20}=$$\frac{7}{12}$ $\frac {17}{50}×\frac {15}{17}=$$\frac{3}{10}$

答案： $\frac{4}{35}$ $\frac{2}{25}$ $\frac{1}{24}$ $\frac{4}{33}$ $\frac{16}{25}$ $\frac{3}{14}$ $\frac{1}{10}$ $\frac{5}{42}$ $\frac{5}{19}$ $\frac{5}{14}$ $\frac{1}{13}$ $\frac{6}{13}$ $\frac{3}{10}$ $\frac{3}{5}$ $\frac{1}{6}$ $\frac{2}{3}$ $\frac{1}{6}$ $\frac{1}{15}$ $\frac{7}{12}$ $\frac{3}{10}$

2. 计算下面各题。(写出计算过程)(每题3★)
$\frac {27}{25}×\frac {35}{18}$ $\frac {12}{77}×\frac {33}{8}$ $\frac {72}{13}×\frac {39}{28}$
$\frac {7}{29}×\frac {87}{4}$ $\frac {17}{19}×\frac {38}{51}$ $\frac {25}{32}×\frac {8}{45}$

答案： $\frac{21}{10}$ $\frac{9}{14}$ $\frac{54}{7}$ $\frac{21}{4}$ $\frac{2}{3}$ $\frac{5}{36}$（计算过程略）

3. 计算下面各题,能简算的要简算。(每题4★)
$\frac {5}{8}-\frac {1}{3}+\frac {5}{12}$ $\frac {2}{3}+4.58+\frac {1}{3}+21.7$ $\frac {7}{15}-\frac {3}{8}+\frac {8}{15}-\frac {5}{8}$

答案： $\frac{17}{24}$ 27.28 0