《2025年阳光同学计算小达人五年级数学下册冀教版》

1. 直接写出得数。（建议2分钟完成）
$\frac{2}{3} \times \frac{1}{4} =$ $\frac{4}{5} \times \frac{3}{8} =$ $\frac{2}{7} \times \frac{1}{3} =$ $\frac{16}{9} \times \frac{3}{8} =$
$\frac{5}{16} \times 8 =$ $\frac{1}{12} \times \frac{3}{7} =$ $\frac{3}{5} \times \frac{7}{6} =$ $\frac{6}{25} \times \frac{5}{3} =$
$\frac{3}{4} \times \frac{2}{3} =$ $\frac{4}{35} \times \frac{7}{8} =$ $15 \times \frac{3}{5} =$ $\frac{8}{25} \times \frac{100}{3} =$
$\frac{11}{15} \times \frac{5}{22} =$ $\frac{9}{14} \times \frac{7}{3} =$ $\frac{5}{12} \times \frac{4}{9} =$ $\frac{4}{5} \times \frac{5}{6} =$

答案： $\frac{1}{6}$@@$\frac{3}{10}$@@$\frac{2}{21}$@@$\frac{2}{3}$@@$\frac{5}{2}$@@$\frac{1}{28}$@@$\frac{7}{10}$@@$\frac{2}{5}$@@$\frac{1}{2}$@@$\frac{1}{10}$@@9@@$\frac{32}{3}$@@$\frac{1}{6}$@@$\frac{3}{2}$@@$\frac{5}{27}$@@$\frac{2}{3}$

2. 用简便方法计算下面各题。（建议6分钟完成）
$\frac{1}{15} \times \frac{1}{7} \times 30$ $\frac{35}{4} \times \frac{8}{7} \times \frac{4}{35}$ $\frac{3}{7} \times 15 - \frac{3}{7} \times 8$
$72 \times (\frac{1}{8} - \frac{1}{36})$ $36 \times \frac{1}{4} \times \frac{1}{9}$ $\frac{18}{13} \times \frac{2}{7} - \frac{2}{7} \times \frac{5}{13}$
$24 \times (\frac{1}{3} + \frac{3}{8})$ $6 \times \frac{3}{8} + \frac{5}{8} \times 6$ $\frac{34}{35} \times 71 - \frac{34}{35}$

答案： $\frac{2}{7}$@@$\frac{8}{7}$@@3@@7@@1@@$\frac{2}{7}$@@17@@6@@68

用简便方法计算。
$88 \times \frac{16}{87}$ $\frac{15}{31} \times 30$ $99 \times \frac{24}{25}$

答案： 16$\frac{16}{87}$@@14$\frac{16}{31}$@@95$\frac{1}{25}$