《2025年口算基础训练六年级数学上册人教版》

3
看图计算

$\frac{1}{2} × \frac{1}{3}= $$\frac{1}{6}$

$\frac{1}{2} × \frac{({ }1)}{({ }2)}= $$\frac{1}{4}$

$\frac{({ }1)}{({ }4)} × \frac{({ }2)}{({ }3)}= $$\frac{1}{6}$

$\frac{({ }2)}{({ }3)} × \frac{({ }1)}{({ }2)}= $$\frac{1}{3}$
计算
$\frac{2}{5} × \frac{2}{3}= $$\frac{4}{15}$
$\frac{3}{25} × \frac{5}{12}= $$\frac{1}{20}$
$\frac{2}{9} × \frac{1}{3}= $$\frac{2}{27}$
$\frac{5}{6} × \frac{1}{7}= $$\frac{5}{42}$
$\frac{7}{8} × \frac{3}{5}= $$\frac{21}{40}$
$\frac{9}{11} × \frac{7}{10}= $$\frac{63}{110}$
$\frac{7}{10} × \frac{1}{8}= $$\frac{7}{80}$
$\frac{1}{6} × \frac{7}{8}= $$\frac{7}{48}$
$\frac{5}{8} × \frac{1}{4}= $$\frac{5}{32}$
$\frac{8}{15} × \frac{1}{5}= $$\frac{8}{75}$
$\frac{2}{5} × \frac{4}{9}= $$\frac{8}{45}$
$\frac{7}{10} × 15= $$\frac{21}{2}$

答案： 解析：题目考查分数的乘法运算，包括分数与分数相乘以及分数与整数相乘。对于分数乘分数，用分子相乘的积做分子，分母相乘的积做分母；对于分数乘整数，用分数的分子和整数相乘的积做分子，分母不变。
答案：
$\frac{1}{2} × \frac{1}{3}= \frac{1}{6}$
$\frac{1}{2} × \frac{(\ 1\ )}{(\ 2\ )}= \frac{1}{4}$
$\frac{(\ 1\ )}{(\ 4\ )} × \frac{(\ 2\ )}{(\ 3\ )}= \frac{1}{6}$
$\frac{(\ 2\ )}{(\ 3\ )} × \frac{(\ 1\ )}{(\ 2\ )}= \frac{1}{3}$
$\frac{2}{5} × \frac{2}{3}= \frac{4}{15}$
$\frac{3}{25} × \frac{5}{12}= \frac{1}{20}$
$\frac{2}{9} × \frac{1}{3}= \frac{2}{27}$
$\frac{5}{6} × \frac{1}{7}= \frac{5}{42}$
$\frac{7}{8} × \frac{3}{5}= \frac{21}{40}$
$\frac{9}{11} × \frac{7}{10}= \frac{63}{110}$
$\frac{7}{10} × \frac{1}{8}= \frac{7}{80}$
$\frac{1}{6} × \frac{7}{8}= \frac{7}{48}$
$\frac{5}{8} × \frac{1}{4}= \frac{5}{32}$
$\frac{8}{15} × \frac{1}{5}= \frac{8}{75}$
$\frac{2}{5} × \frac{4}{9}= \frac{8}{45}$
$\frac{7}{10} × 15= \frac{21}{2}=10.5$