《2025年口算训练六年级数学上册人教版双色升级版》

$\frac {6}{7}×\frac {2}{3}= $
$\frac {9}{20}×\frac {5}{6}= $
$\frac {3}{5}×60= $
$\frac {10}{21}×\frac {14}{25}= $
$20×\frac {5}{8}= $
$\frac {9}{52}×\frac {13}{15}= $
$\frac {9}{16}×\frac {4}{3}= $
$\frac {5}{21}×\frac {2}{15}= $
$36×\frac {2}{45}= $
$\frac {4}{9}×6+\frac {1}{3}= $
$\frac {1}{5}+\frac {4}{15}×9= $
$\frac {5}{14}×\frac {8}{35}= $
$\frac {11}{24}×18= $

答案： 解析：
这些题目都是分数乘法的基础练习题，主要考查分数乘法的运算规则，即分子乘分子作为新的分子，分母乘分母作为新的分母，能约分的先约分。
答案：
$\frac{6}{7} × \frac{2}{3} = \frac{4}{7}$
$\frac{9}{20} × \frac{5}{6} = \frac{3}{8}$
$\frac{3}{5} × 60 = 36$
$\frac{10}{21} × \frac{14}{25} = \frac{4}{15}$
$20 × \frac{5}{8} = \frac{25}{2}$
$\frac{9}{52} × \frac{13}{15} = \frac{3}{20}$
$\frac{9}{16} × \frac{4}{3} = \frac{3}{4}$
$\frac{5}{21} × \frac{2}{15} = \frac{2}{63}$
$36 × \frac{2}{45} = \frac{8}{5}$
$\frac{4}{9} × 6 + \frac{1}{3} = \frac{9}{3} = 3$
$\frac{1}{5} + \frac{4}{15} × 9 = \frac{13}{5}$
$\frac{5}{14} × \frac{8}{35} = \frac{4}{49}$
$\frac{11}{24} × 18 = \frac{33}{4}$

$\frac {1}{2}×9= $$\frac{9}{2}$
$\frac {5}{6}-\frac {5}{12}= $$\frac{5}{12}$
$\frac {1}{4}+\frac {5}{26}= $$\frac{23}{52}$
$\frac {17}{18}×\frac {1}{2}= $$\frac{17}{36}$
$\frac {25}{39}×\frac {3}{4}= $$\frac{25}{52}$
$\frac {3}{10}×11-\frac {3}{10}= $3
$\frac {4}{11}×4-1= $$\frac{5}{11}$
$\frac {9}{10}×\frac {8}{9}= $$\frac{4}{5}$
$12×\frac {3}{10}= $$\frac{18}{5}$
$\frac {2}{13}×39= $6
$\frac {3}{10}+\frac {3}{20}= $$\frac{9}{20}$
$\frac {3}{8}+\frac {2}{21}= $$\frac{79}{168}$
$\frac {4}{5}×\frac {3}{28}= $$\frac{3}{35}$

答案： 解析：
这些题目主要考查分数的加减乘除基本运算。
答案：
$\frac{1}{2} × 9 = \frac{9}{2}$
$\frac{5}{6} - \frac{5}{12} = \frac{10}{12} - \frac{5}{12} = \frac{5}{12}$
$\frac{1}{4} + \frac{5}{26} = \frac{13}{52} + \frac{10}{52} = \frac{23}{52}$
$\frac{17}{18} × \frac{1}{2} = \frac{17}{36}$
$\frac{25}{39} × \frac{3}{4} = \frac{75}{156} = \frac{25}{52}$
$\frac{3}{10} × 11 - \frac{3}{10} = \frac{33}{10} - \frac{3}{10} = \frac{30}{10} = 3$
$\frac{4}{11} × 4 - 1 = \frac{16}{11} - 1 = \frac{16}{11} - \frac{11}{11} = \frac{5}{11}$
$\frac{9}{10} × \frac{8}{9} = \frac{72}{90} = \frac{4}{5}$
$12 × \frac{3}{10} = \frac{36}{10} = \frac{18}{5}$
$\frac{2}{13} × 39 = 6$
$\frac{3}{10} + \frac{3}{20} = \frac{6}{20} + \frac{3}{20} = \frac{9}{20}$
$\frac{3}{8} + \frac{2}{21} = \frac{63}{168} + \frac{16}{168} = \frac{79}{168}$
$\frac{4}{5} × \frac{3}{28} = \frac{12}{140} = \frac{3}{35}$

$\frac {1}{15}×\frac {5}{6}=$$\frac{1}{18}$
$\frac {4}{5}×\frac {5}{6}=$$\frac{2}{3}$
$\frac {3}{8}×\frac {1}{18}=$$\frac{1}{48}$
$\frac {9}{20}×\frac {2}{3}=$$\frac{3}{10}$
$\frac {3}{5}×15=$9
$\frac {2}{9}×\frac {3}{4}=$$\frac{1}{6}$
$36×\frac {1}{6}=$6
$\frac {4}{7}×\frac {5}{8}=$$\frac{5}{14}$
$\frac {5}{6}×12=$10
$\frac {1}{5}×10=$2
$\frac {4}{5}×\frac {5}{8}=$$\frac{1}{2}$
$\frac {2}{3}×\frac {3}{8}=$$\frac{1}{4}$
$\frac {2}{5}×\frac {5}{14}=$$\frac{1}{7}$

答案： 解析：
这些题目都是分数乘法的练习。
分数乘法的计算法则是：分子乘分子做新的分子，分母乘分母做新的分母，能约分的先约分再计算会更简便。
答案：
1. $\frac{1}{15} × \frac{5}{6} = \frac{1 × 5}{15 × 6} = \frac{5}{90} = \frac{1}{18}$
2. $\frac{4}{5} × \frac{5}{6} = \frac{4 × 5}{5 × 6} = \frac{20}{30} = \frac{2}{3}$
3. $\frac{3}{8} × \frac{1}{18} = \frac{3 × 1}{8 × 18} = \frac{3}{144} = \frac{1}{48}$
4. $\frac{9}{20} × \frac{2}{3} = \frac{9 × 2}{20 × 3} = \frac{18}{60} = \frac{3}{10}$
5. $\frac{3}{5} × 15 = \frac{3 × 15}{5} = \frac{45}{5} = 9$
6. $\frac{2}{9} × \frac{3}{4} = \frac{2 × 3}{9 × 4} = \frac{6}{36} = \frac{1}{6}$
7. $36 × \frac{1}{6} = \frac{36 × 1}{6} = \frac{36}{6} = 6$
8. $\frac{4}{7} × \frac{5}{8} = \frac{4 × 5}{7 × 8} = \frac{20}{56} = \frac{5}{14}$
9. $\frac{5}{6} × 12 = \frac{5 × 12}{6} = \frac{60}{6} = 10$
10. $\frac{1}{5} × 10 = \frac{1 × 10}{5} = \frac{10}{5} = 2$
11. $\frac{4}{5} × \frac{5}{8} = \frac{4 × 5}{5 × 8} = \frac{20}{40} = \frac{1}{2}$
12. $\frac{2}{3} × \frac{3}{8} = \frac{2 × 3}{3 × 8} = \frac{6}{24} = \frac{1}{4}$
13. $\frac{2}{5} × \frac{5}{14} = \frac{2 × 5}{5 × 14} = \frac{10}{70} = \frac{1}{7}$