《2025年口算训练六年级数学上册人教版双色升级版》

$\frac {1}{4}×\frac {1}{6}= $
$\frac {17}{20}×\frac {3}{34}= $
$\frac {7}{18}×\frac {3}{14}= $
$\frac {7}{25}×\frac {5}{21}= $
$\frac {9}{4}×\frac {5}{18}= $
$\frac {10}{39}×\frac {1}{4}= $
$\frac {5}{6}×\frac {3}{25}= $
$\frac {1}{21}×\frac {3}{4}= $
$\frac {8}{9}×\frac {1}{16}= $
$13×\frac {5}{26}= $
$10×\frac {7}{45}= $
$\frac {11}{35}×20= $
$\frac {8}{21}×\frac {7}{24}= $

答案： $\frac{1}{4}×\frac{1}{6}=\frac{1×1}{4×6}=\frac{1}{24}$
$\frac{17}{20}×\frac{3}{34}=\frac{17×3}{20×34}=\frac{3}{40}$
$\frac{7}{18}×\frac{3}{14}=\frac{7×3}{18×14}=\frac{1}{12}$
$\frac{7}{25}×\frac{5}{21}=\frac{7×5}{25×21}=\frac{1}{15}$
$\frac{9}{4}×\frac{5}{18}=\frac{9×5}{4×18}=\frac{5}{8}$
$\frac{10}{39}×\frac{1}{4}=\frac{10×1}{39×4}=\frac{5}{78}$
$\frac{5}{6}×\frac{3}{25}=\frac{5×3}{6×25}=\frac{1}{10}$
$\frac{1}{21}×\frac{3}{4}=\frac{1×3}{21×4}=\frac{1}{28}$
$\frac{8}{9}×\frac{1}{16}=\frac{8×1}{9×16}=\frac{1}{18}$
$13×\frac{5}{26}=\frac{13×5}{26}=\frac{5}{2}$
$10×\frac{7}{45}=\frac{10×7}{45}=\frac{14}{9}$
$\frac{11}{35}×20=\frac{11×20}{35}=\frac{44}{7}$
$\frac{8}{21}×\frac{7}{24}=\frac{8×7}{21×24}=\frac{1}{9}$

$\frac {1}{3}×\frac {12}{31}= $
$\frac {1}{2}×\frac {4}{5}= $
$\frac {11}{18}×\frac {10}{33}= $
$\frac {2}{25}×\frac {10}{3}= $
$\frac {11}{25}×\frac {15}{44}= $
$\frac {1}{5}×\frac {25}{13}= $
$\frac {11}{18}×9= $
$\frac {5}{6}×\frac {4}{15}= $
$8×\frac {5}{12}= $
$\frac {5}{13}×65= $
$\frac {9}{10}×35= $
$\frac {7}{16}×\frac {4}{21}= $
$\frac {5}{11}×44= $

答案： 解析：
这些题目都是分数乘法的基础练习。在分数乘法中，我们直接将两个分数的分子相乘得到新的分子，将两个分数的分母相乘得到新的分母。如果结果可以约分，则需要进行约分。
答案：
$\frac{1}{3} × \frac{12}{31} = \frac{4}{31}$
$\frac{1}{2} × \frac{4}{5} = \frac{2}{5}$
$\frac{11}{18} × \frac{10}{33} = \frac{5}{27}$
$\frac{2}{25} × \frac{10}{3} = \frac{4}{15}$
$\frac{11}{25} × \frac{15}{44} = \frac{3}{20}$
$\frac{1}{5} × \frac{25}{13} = \frac{5}{13}$
$\frac{11}{18} × 9 = \frac{11}{2}$
$\frac{5}{6} × \frac{4}{15} = \frac{2}{9}$
$8 × \frac{5}{12} = \frac{10}{3}$
$\frac{5}{13} × 65 = 25$
$\frac{9}{10} × 35 = \frac{63}{2}$
$\frac{7}{16} × \frac{4}{21} = \frac{1}{12}$
$\frac{5}{11} × 44 = 20$

$1.4×\frac {2}{7}=$0.4
$1.5×\frac {3}{5}=$0.9
$2.8×\frac {4}{7}=$1.6
$3.6×\frac {5}{6}=$3
$\frac {4}{5}×0.5=$0.4
$\frac {2}{7}×0.2=$$\frac{2}{35}$
$\frac {7}{32}×0.8=$$\frac{7}{40}$
$\frac {5}{12}×0.6=$0.25
$\frac {2}{3}×0.4=$$\frac{4}{15}$
$\frac {17}{18}×0.6=$$\frac{17}{30}$
$\frac {5}{12}×0.3=$0.125
$\frac {5}{16}×0.2=$$\frac{1}{16}$
$\frac {7}{9}×2.7=$2.1

答案： 0.4
0.9
1.6
3
0.4
$\frac{2}{35}$
$\frac{7}{40}$
0.25
$\frac{4}{15}$
$\frac{17}{30}$
0.125
$\frac{1}{16}$
2.1