《2025年心算口算巧算六年级上册北师大版》

1 口算。
$\frac{3}{4}×16=$
$12÷\frac{3}{5}=$
$\frac{3}{10}×\frac{5}{6}=$
$\frac{3}{5}÷\frac{9}{10}=$
$1÷\frac{7}{8}=$
$\frac{5}{7}×\frac{2}{3}=$
$\frac{5}{24}×12=$
$6×\frac{5}{24}=$
$\frac{4}{9}×\frac{27}{10}=$
$\frac{2}{3}×\frac{3}{4}=$
$\frac{12}{5}×\frac{5}{6}=$
$72÷\frac{8}{9}=$

答案： 12
20
$\frac{1}{4}$
$\frac{2}{3}$
$\frac{8}{7}$
$\frac{10}{21}$
$\frac{5}{2}$
$\frac{5}{4}$
$\frac{6}{5}$
$\frac{1}{2}$
2
81

2 计算下面各题。
$\frac{1}{3}÷(\frac{1}{12}÷\frac{5}{12})$
$\frac{1}{3}÷(\frac{1}{6}×\frac{1}{2})$
$\frac{2}{3}×\frac{3}{2}÷\frac{4}{7}$
$\frac{4}{5}×\frac{2}{3}÷\frac{3}{4}$
$\frac{6}{7}÷\frac{1}{7}×\frac{3}{14}$
$\frac{2}{11}×(\frac{3}{8}÷\frac{1}{2})$

答案： $\frac{1}{3}÷(\frac{1}{12}÷\frac{5}{12})$
解：$\frac{1}{12}÷\frac{5}{12}=\frac{1}{5}$，$\frac{1}{3}÷\frac{1}{5}=\frac{5}{3}$
$\frac{1}{3}÷(\frac{1}{6}×\frac{1}{2})$
解：$\frac{1}{6}×\frac{1}{2}=\frac{1}{12}$，$\frac{1}{3}÷\frac{1}{12}=4$
$\frac{2}{3}×\frac{3}{2}÷\frac{4}{7}$
解：$\frac{2}{3}×\frac{3}{2}=1$，$1÷\frac{4}{7}=\frac{7}{4}$
$\frac{4}{5}×\frac{2}{3}÷\frac{3}{4}$
解：$\frac{8}{15}÷\frac{3}{4}=\frac{32}{45}$
$\frac{6}{7}÷\frac{1}{7}×\frac{3}{14}$
解：$\frac{6}{7}×7=6$，$6×\frac{3}{14}=\frac{9}{7}$
$\frac{2}{11}×(\frac{3}{8}÷\frac{1}{2})$
解：$\frac{3}{8}÷\frac{1}{2}=\frac{3}{4}$，$\frac{2}{11}×\frac{3}{4}=\frac{3}{22}$