《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 {2}{5}×\frac {5}{2}=$1 $19×\frac {1}{19}=$1 $44×\frac {3}{11}=$12 $7×\frac {3}{28}=$$\frac{3}{4}$
$\frac {5}{9}×\frac {9}{10}=$$\frac{1}{2}$ $\frac {3}{4}×\frac {16}{15}=$$\frac{4}{5}$ $\frac {14}{3}×\frac {5}{21}=$$\frac{10}{9}$ $1×\frac {1}{16}=$$\frac{1}{16}$
$\frac {2}{5}×\frac {5}{12}=$$\frac{1}{6}$ $\frac {7}{10}×\frac {12}{7}=$$\frac{6}{5}$ $3×\frac {5}{3}=$5 $\frac {7}{15}×\frac {45}{91}=$$\frac{3}{13}$
$\frac {11}{12}×\frac {15}{22}=$$\frac{5}{8}$ $\frac {19}{26}×\frac {13}{38}=$$\frac{1}{4}$ $\frac {3}{10}×\frac {10}{3}=$1 $\frac {1}{4}×\frac {1}{6}=$$\frac{1}{24}$
$21×\frac {1}{7}=$3 $\frac {5}{17}×\frac {17}{5}=$1 $\frac {35}{6}×\frac {9}{5}=$$\frac{21}{2}$ $\frac {7}{9}×\frac {27}{14}=$$\frac{3}{2}$

答案： 1 1 12 $\frac{3}{4}$
$\frac{1}{2}$ $\frac{4}{5}$ $\frac{10}{9}$ $\frac{1}{16}$
$\frac{1}{6}$ $\frac{6}{5}$ 5 $\frac{3}{13}$
$\frac{5}{8}$ $\frac{1}{4}$ 1 $\frac{1}{24}$
3 1 $\frac{21}{2}$ $\frac{3}{2}$

2. 计算下面各题。(写出计算过程)(每题3★)
$\frac {19}{39}×\frac {13}{5}$ $\frac {11}{35}×\frac {27}{22}$ $\frac {25}{54}×\frac {9}{10}$
$\frac {33}{14}×\frac {56}{55}$ $\frac {9}{25}×\frac {35}{6}$ $\frac {7}{65}×\frac {13}{28}$

答案： $\frac{19}{15}$ $\frac{27}{70}$ $\frac{5}{12}$
$\frac{12}{5}$ $\frac{21}{10}$ $\frac{1}{20}$
（计算过程略）

3. 计算下面各题,能简算的要简算。(每题3★)
$\frac {13}{19}-\frac {3}{8}+\frac {6}{19}$ $\frac {8}{13}-(\frac {5}{11}-\frac {5}{13})$ $\frac {8}{9}-\frac {3}{11}+\frac {10}{9}-\frac {7}{11}$

答案： $\frac{5}{8}$ $\frac{6}{11}$ $1\frac{1}{11}$