《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 {5}{9}×4=$$\frac{20}{9}$ $\frac {8}{27}×2=$$\frac{16}{27}$ $5×\frac {1}{3}=$$\frac{5}{3}$ $8×\frac {10}{7}=$$\frac{80}{7}$
$12×\frac {5}{8}=$$\frac{15}{2}$ $\frac {2}{7}×\frac {3}{4}=$$\frac{3}{14}$ $\frac {25}{24}×\frac {16}{15}=$$\frac{10}{9}$ $\frac {14}{17}×\frac {17}{28}=$$\frac{1}{2}$
$\frac {7}{9}×\frac {2}{21}=$$\frac{2}{27}$ $\frac {7}{18}×\frac {9}{14}=$$\frac{1}{4}$ $\frac {8}{17}×\frac {17}{16}=$$\frac{1}{2}$ $\frac {7}{11}×\frac {22}{63}=$$\frac{2}{9}$
$\frac {1}{6}×\frac {3}{7}=$$\frac{1}{14}$ $\frac {3}{4}×\frac {4}{11}=$$\frac{3}{11}$ $\frac {21}{52}×\frac {26}{27}=$$\frac{7}{18}$ $\frac {15}{19}×\frac {38}{45}=$$\frac{2}{3}$
$\frac {5}{9}×\frac {3}{10}=$$\frac{1}{6}$ $\frac {4}{7}×\frac {21}{10}=$$\frac{6}{5}$ $\frac {3}{14}×\frac {7}{12}=$$\frac{1}{8}$ $\frac {17}{18}×\frac {9}{5}=$$\frac{17}{10}$

答案： $\frac{20}{9}$ $\frac{16}{27}$ $\frac{5}{3}$ $\frac{80}{7}$
$\frac{15}{2}$ $\frac{3}{14}$ $\frac{10}{9}$ $\frac{1}{2}$
$\frac{2}{27}$ $\frac{1}{4}$ $\frac{1}{2}$ $\frac{2}{9}$
$\frac{1}{14}$ $\frac{3}{11}$ $\frac{7}{18}$ $\frac{2}{3}$
$\frac{1}{6}$ $\frac{6}{5}$ $\frac{1}{8}$ $\frac{17}{10}$

2. 计算下面各题,能简算的要简算。(每题 3★)
$7-\frac {4}{9}-\frac {5}{9}$ $\frac {8}{13}+\frac {1}{11}+\frac {5}{13}$ $\frac {5}{6}+\frac {1}{8}-\frac {5}{6}+\frac {7}{8}$

答案： 6 $1\frac{1}{11}$ 1

3. 解方程。(每题 3★)
$x+\frac {2}{3}= \frac {13}{15}$，$x=$$\frac{1}{5}$ $\frac {5}{8}+x= \frac {7}{10}$，$x=$$\frac{3}{40}$ $x-\frac {13}{30}= 1$，$x=$$1\frac{13}{30}$
$x+\frac {5}{6}= \frac {6}{7}$，$x=$$\frac{1}{42}$ $\frac {12}{13}+x= 1$，$x=$$\frac{1}{13}$ $\frac {4}{5}+\frac {4}{15}+x= 2$，$x=$$\frac{14}{15}$

答案： $x=\frac{1}{5}$ $x=\frac{3}{40}$ $x=1\frac{13}{30}$
$x=\frac{1}{42}$ $x=\frac{1}{13}$ $x=\frac{14}{15}$