《2025年口算训练六年级数学上册人教版双色升级版》

$8÷ \frac {4}{11}= $
$\frac {4}{35}÷ \frac {2}{5}= $
$\frac {3}{4}÷ \frac {9}{16}= $
$\frac {5}{8}÷ \frac {5}{6}= $
$\frac {3}{4}÷ \frac {3}{5}= $
$\frac {1}{7}÷ \frac {2}{5}= $
$\frac {1}{4}÷ \frac {2}{5}= $
$\frac {1}{6}÷ \frac {2}{7}= $
$\frac {1}{16}÷ \frac {3}{8}= $
$\frac {2}{7}÷ \frac {4}{9}= $
$\frac {5}{9}÷ \frac {7}{9}= $
$\frac {1}{10}÷ \frac {8}{9}= $
$\frac {5}{7}÷ \frac {4}{5}= $

答案： 解析：这些题目都是分数除法的计算题。分数除法的计算法则是：除以一个分数等于乘以这个分数的倒数。所以，我们只需要将除数取倒数，然后与被除数相乘即可。
答案：
$8 ÷ \frac{4}{11} = 8 × \frac{11}{4} = 22$
$\frac{4}{35} ÷ \frac{2}{5} = \frac{4}{35} × \frac{5}{2} = \frac{2}{7}$
$\frac{3}{4} ÷ \frac{9}{16} = \frac{3}{4} × \frac{16}{9} = \frac{4}{3}$
$\frac{5}{8} ÷ \frac{5}{6} = \frac{5}{8} × \frac{6}{5} = \frac{3}{4}$
$\frac{3}{4} ÷ \frac{3}{5} = \frac{3}{4} × \frac{5}{3} = \frac{5}{4}$
$\frac{1}{7} ÷ \frac{2}{5} = \frac{1}{7} × \frac{5}{2} = \frac{5}{14}$
$\frac{1}{4} ÷ \frac{2}{5} = \frac{1}{4} × \frac{5}{2} = \frac{5}{8}$
$\frac{1}{6} ÷ \frac{2}{7} = \frac{1}{6} × \frac{7}{2} = \frac{7}{12}$
$\frac{1}{16} ÷ \frac{3}{8} = \frac{1}{16} × \frac{8}{3} = \frac{1}{6}$
$\frac{2}{7} ÷ \frac{4}{9} = \frac{2}{7} × \frac{9}{4} = \frac{9}{14}$
$\frac{5}{9} ÷ \frac{7}{9} = \frac{5}{9} × \frac{9}{7} = \frac{5}{7}$
$\frac{1}{10} ÷ \frac{8}{9} = \frac{1}{10} × \frac{9}{8} = \frac{9}{80}$
$\frac{5}{7} ÷ \frac{4}{5} = \frac{5}{7} × \frac{5}{4} = \frac{25}{28}$

$\frac {15}{17}× \frac {1}{9}= $
$\frac {4}{15}× \frac {3}{8}= $
$90× \frac {2}{9}= $
$\frac {5}{4}× \frac {12}{25}= $
$\frac {3}{14}× 18= $
$68÷ \frac {7}{5}= $
$24÷ \frac {8}{7}= $
$\frac {7}{18}× 48= $
$\frac {5}{8}× \frac {2}{3}= $
$\frac {4}{5}÷ \frac {16}{7}= $
$\frac {11}{42}÷ \frac {1}{6}= $
$\frac {2}{9}÷ \frac {3}{4}= $
$\frac {11}{25}÷ \frac {22}{5}= $

答案： 解析：
这些题目都是基础的数学运算题目，主要考察分数的乘法和除法运算。
对于分数的乘法，直接相乘即可，即分子乘分子作为新的分子，分母乘分母作为新的分母。
对于分数与整数的乘法，可以将整数看作分母为1的分数，然后进行乘法运算。
对于分数的除法，可以转化为乘法进行运算，即除以一个分数等于乘以这个分数的倒数。
答案：
$\frac{15}{17} × \frac{1}{9} = \frac{15 × 1}{17 × 9} = \frac{5}{51}$
$\frac{4}{15} × \frac{3}{8} = \frac{4 × 3}{15 × 8} = \frac{1}{10}$
$90 × \frac{2}{9} = \frac{90 × 2}{9} = 20$
$\frac{5}{4} × \frac{12}{25} = \frac{5 × 12}{4 × 25} = \frac{3}{5}$
$\frac{3}{14} × 18 = \frac{3 × 18}{14} = \frac{27}{7}$，也可以写作$3\frac{6}{7}$
$68 ÷ \frac{7}{5} = 68 × \frac{5}{7} = \frac{68 × 5}{7} = \frac{340}{7}$，也可以写作$48\frac{4}{7}$
$24 ÷ \frac{8}{7} = 24 × \frac{7}{8} = \frac{24 × 7}{8} = 21$
$\frac{7}{18} × 48 = \frac{7 × 48}{18} = \frac{56}{3}$，也可以写作$18\frac{2}{3}$
$\frac{5}{8} × \frac{2}{3} = \frac{5 × 2}{8 × 3} = \frac{5}{12}$
$\frac{4}{5} ÷ \frac{16}{7} = \frac{4}{5} × \frac{7}{16} = \frac{7}{20}$
$\frac{11}{42} ÷ \frac{1}{6} = \frac{11}{42} × 6 = \frac{11 × 6}{42} = \frac{11}{7}$，也可以写作$1\frac{4}{7}$
$\frac{2}{9} ÷ \frac{3}{4} = \frac{2}{9} × \frac{4}{3} = \frac{8}{27}$
$\frac{11}{25} ÷ \frac{22}{5} = \frac{11}{25} × \frac{5}{22} = \frac{1}{10}$

$800× \frac {3}{3+5}=$300
$800× \frac {5}{3+5}=$500
$65× \frac {2}{2+11}=$10
$65× \frac {11}{2+11}=$55
$570× \frac {5}{5+14}=$150
$570× \frac {14}{5+14}=$420
$28× \frac {3}{3+4}=$12
$28× \frac {4}{3+4}=$16
$240× \frac {1}{1+2+5}=$30
$240× \frac {2}{1+2+5}=$60
$240× \frac {5}{1+2+5}=$150
$360× \frac {1}{1+2+3}=$60
$360× \frac {2}{1+2+3}=$120

答案： 解析：
这些题目都是基础的数学运算题目，主要考察分数的运算和基本的算术能力。
对于每一个表达式，我们只需要将数值与对应的分数相乘即可得出结果。
答案：
$800 × \frac{3}{3+5} = 800 × \frac{3}{8} = 300$
$800 × \frac{5}{3+5} = 800 × \frac{5}{8} = 500$
$65 × \frac{2}{2+11} = 65 × \frac{2}{13} = 10$
$65 × \frac{11}{2+11} = 65 × \frac{11}{13} = 55$
$570 × \frac{5}{5+14} = 570 × \frac{5}{19} = 150$
$570 × \frac{14}{5+14} = 570 × \frac{14}{19} = 420$
$28 × \frac{3}{3+4} = 28 × \frac{3}{7} = 12$
$28 × \frac{4}{3+4} = 28 × \frac{4}{7} = 16$
$240 × \frac{1}{1+2+5} = 240 × \frac{1}{8} = 30$
$240 × \frac{2}{1+2+5} = 240 × \frac{2}{8} = 60$
$240 × \frac{5}{1+2+5} = 240 × \frac{5}{8} = 150$
$360 × \frac{1}{1+2+3} = 360 × \frac{1}{6} = 60$
$360 × \frac{2}{1+2+3} = 360 × \frac{2}{6} = 120$