《2025年口算训练六年级数学上册人教版双色升级版》

$\frac {1}{5}+\frac {1}{5}= $
$\frac {1}{5}×5= $
$\frac {5}{6}+\frac {5}{6}= $
$\frac {5}{6}×3= $
$\frac {7}{8}+\frac {7}{8}= $
$\frac {7}{8}×4= $
$\frac {4}{9}+\frac {4}{9}= $
$\frac {4}{9}×2= $
$\frac {7}{18}+\frac {7}{18}= $
$\frac {7}{18}×2= $
$\frac {7}{20}×30= $
$\frac {3}{7}+\frac {3}{7}= $
$\frac {3}{7}×2= $

答案： 解析：
这些题目都是基础的分数加减法和乘法运算题目。对于同分母的分数相加，直接将分子相加即可；对于分数与整数的乘法，直接将分子与整数相乘即可。
答案：
$\frac {1}{5}+\frac {1}{5}=\frac {2}{5}$
$\frac {1}{5}×5=1$
$\frac {5}{6}+\frac {5}{6}=\frac {10}{6}=\frac {5}{3}$
$\frac {5}{6}×3=\frac {15}{6}=\frac {5}{2}$
$\frac {7}{8}+\frac {7}{8}=\frac {14}{8}=\frac {7}{4}$
$\frac {7}{8}×4=\frac {28}{8}=\frac {7}{2}$
$\frac {4}{9}+\frac {4}{9}=\frac {8}{9}$
$\frac {4}{9}×2=\frac {8}{9}$
$\frac {7}{18}+\frac {7}{18}=\frac {14}{18}=\frac {7}{9}$
$\frac {7}{18}×2=\frac {14}{18}=\frac {7}{9}$
$\frac {7}{20}×30=\frac {210}{20}=\frac {21}{2}=10.5$
$\frac {3}{7}+\frac {3}{7}=\frac {6}{7}$
$\frac {3}{7}×2=\frac {6}{7}$

$\frac {7}{11}×3= $$\frac{21}{11}$
$\frac {3}{8}×4= $$\frac{3}{2}$
$15×\frac {1}{6}= $$\frac{5}{2}$
$21×\frac {2}{9}= $$\frac{14}{3}$
$11×\frac {3}{7}= $$\frac{33}{7}$
$24×\frac {1}{6}= $4
$18×\frac {8}{9}= $16
$\frac {2}{3}×12= $8
$\frac {7}{10}×15= $$\frac{21}{2}$
$\frac {1}{12}×18= $$\frac{3}{2}$
$\frac {3}{8}×3= $$\frac{9}{8}$
$16×\frac {5}{12}= $$\frac{20}{3}$
$\frac {7}{9}×27= $21

答案： 解析：
这些题目都是分数与整数的乘法运算。
对于这类题目，我们将分数的分子与整数相乘，然后除以分数的分母，得到最终结果。
如果结果可以约分，则进行约分。
答案：
$\frac{7}{11} × 3 = \frac{21}{11}$
$\frac{3}{8} × 4 = \frac{12}{8} = \frac{3}{2}$
$15 × \frac{1}{6} = \frac{15}{6} = \frac{5}{2}$
$21 × \frac{2}{9} = \frac{42}{9} = \frac{14}{3}$
$11 × \frac{3}{7} = \frac{33}{7}$
$24 × \frac{1}{6} = \frac{24}{6} = 4$
$18 × \frac{8}{9} = \frac{144}{9} = 16$
$\frac{2}{3} × 12 = \frac{24}{3} = 8$
$\frac{7}{10} × 15 = \frac{105}{10} = \frac{21}{2}$
$\frac{1}{12} × 18 = \frac{18}{12} = \frac{3}{2}$
$\frac{3}{8} × 3 = \frac{9}{8}$
$16 × \frac{5}{12} = \frac{80}{12} = \frac{20}{3}$
$\frac{7}{9} × 27 = \frac{189}{9} = 21$

$2×\frac {2}{3}=$$\frac{4}{3}$
$10×\frac {9}{10}=$9
$18×\frac {2}{9}=$4
$33×\frac {5}{11}=$15
$4×\frac {2}{5}=$$\frac{8}{5}$
$9×\frac {1}{6}=$$\frac{3}{2}$
$4×\frac {1}{12}=$$\frac{1}{3}$
$5×\frac {3}{20}=$$\frac{3}{4}$
$6×\frac {17}{18}=$$\frac{17}{3}$
$3×\frac {5}{12}=$$\frac{5}{4}$
$2×\frac {2}{11}=$$\frac{4}{11}$
$7×\frac {3}{14}=$$\frac{3}{2}$
$5×\frac {4}{25}=$$\frac{4}{5}$

答案： 解析：
这些题目都是基础的分数乘法口算题，主要考察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：
$2 × \frac{2}{3} = \frac{4}{3}$
$10 × \frac{9}{10} = 9$
$18 × \frac{2}{9} = 4$
$33 × \frac{5}{11} = 15$
$4 × \frac{2}{5} = \frac{8}{5}$
$9 × \frac{1}{6} = \frac{3}{2}$
$4 × \frac{1}{12} = \frac{1}{3}$
$5 × \frac{3}{20} = \frac{3}{4}$
$6 × \frac{17}{18} = \frac{17}{3}$
$3 × \frac{5}{12} = \frac{5}{4}$
$2 × \frac{2}{11} = \frac{4}{11}$
$7 × \frac{3}{14} = \frac{3}{2}$
$5 × \frac{4}{25} = \frac{4}{5}$