《2025年心算口算巧算六年级上册北师大版》

1 口算。
$\frac{3}{4}÷\frac{3}{16}=$
$\frac{12}{13}÷\frac{1}{39}=$
$\frac{4}{7}÷\frac{5}{9}=$
$\frac{5}{16}×\frac{8}{15}=$
$\frac{7}{8}×\frac{4}{5}=$
$\frac{3}{5}×\frac{1}{2}=$
$\frac{5}{14}÷\frac{10}{21}=$
$\frac{11}{20}×\frac{2}{5}=$
$\frac{4}{9}÷\frac{2}{5}=$
$\frac{2}{7}×\frac{14}{5}=$
$\frac{5}{8}×\frac{3}{2}=$
$\frac{2}{9}÷\frac{5}{14}=$
$\frac{6}{7}÷\frac{3}{4}=$
$\frac{5}{7}÷\frac{15}{16}=$
$\frac{9}{10}×\frac{5}{3}=$

答案： 4
36
$\frac{36}{35}$
$\frac{1}{6}$
$\frac{7}{10}$
$\frac{3}{10}$
$\frac{3}{4}$
$\frac{11}{50}$
$\frac{10}{9}$
$\frac{4}{5}$
$\frac{15}{16}$
$\frac{28}{45}$
$\frac{8}{7}$
$\frac{16}{21}$
$\frac{3}{2}$

2 计算下面各题。
$\frac{3}{5}×(\frac{1}{8}×\frac{5}{6})$
$\frac{5}{14}÷\frac{3}{7}×\frac{4}{5}$
$\frac{6}{7}×(\frac{5}{8}÷\frac{1}{2})$
$\frac{7}{9}×\frac{4}{7}×\frac{5}{8}$
$\frac{5}{3}÷\frac{5}{6}×\frac{3}{10}$
$\frac{4}{7}÷\frac{8}{9}×\frac{1}{3}$

答案： $\frac{3}{5}×(\frac{1}{8}×\frac{5}{6})$
解：$\frac{1}{8}×\frac{5}{6}=\frac{5}{48}$，$\frac{3}{5}×\frac{5}{48}=\frac{1}{16}$
$\frac{5}{14}÷\frac{3}{7}×\frac{4}{5}$
解：$\frac{5}{14}×\frac{7}{3}=\frac{5}{6}$，$\frac{5}{6}×\frac{4}{5}=\frac{2}{3}$
$\frac{6}{7}×(\frac{5}{8}÷\frac{1}{2})$
解：$\frac{5}{8}÷\frac{1}{2}=\frac{5}{4}$，$\frac{6}{7}×\frac{5}{4}=\frac{15}{14}$
$\frac{7}{9}×\frac{4}{7}×\frac{5}{8}$
解：$\frac{4}{9}×\frac{5}{8}=\frac{5}{18}$
$\frac{5}{3}÷\frac{5}{6}×\frac{3}{10}$
解：$\frac{5}{3}×\frac{6}{5}=2$，$2×\frac{3}{10}=\frac{3}{5}$
$\frac{4}{7}÷\frac{8}{9}×\frac{1}{3}$
解：$\frac{4}{7}×\frac{9}{8}=\frac{9}{14}$，$\frac{9}{14}×\frac{1}{3}=\frac{3}{14}$