《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 4 分钟完成）
$18\div\frac{9}{10}=$ $\frac{8}{9}\div\frac{4}{3}=$ $\frac{1}{4}\div\frac{4}{5}=$ $\frac{7}{5}\div\frac{7}{15}=$
$25\div\frac{5}{4}=$ $9\div\frac{3}{5}=$ $\frac{7}{8}\div\frac{8}{7}=$ $\frac{14}{11}\div28=$
$\frac{5}{6}\div\frac{5}{11}=$ $\frac{1}{3}\div\frac{1}{5}=$ $\frac{3}{14}\div\frac{3}{4}=$ $\frac{4}{9}\div\frac{2}{9}=$
$\frac{17}{62}\div\frac{17}{31}=$ $4\div\frac{4}{3}=$ $\frac{39}{35}\div\frac{13}{18}=$ $\frac{3}{8}\div\frac{1}{2}=$
$\frac{2}{7}\div8=$ $\frac{7}{15}\div\frac{3}{5}=$ $144\div\frac{12}{5}=$ $5\div\frac{2}{5}=$
$3\div\frac{18}{7}=$ $5\div\frac{2}{3}=$ $\frac{6}{5}\div\frac{7}{10}=$ $\frac{4}{5}\div\frac{1}{4}=$
$12\div\frac{6}{5}=$ $\frac{7}{2}\div\frac{6}{7}=$ $15\div\frac{3}{2}=$ $\frac{8}{9}\div32=$

答案： 20@@$\frac{2}{3}$@@$\frac{5}{16}$@@3@@20@@15@@$\frac{49}{64}$@@$\frac{1}{22}$@@$\frac{11}{6}$@@$\frac{5}{3}$@@$\frac{2}{7}$@@2@@$\frac{1}{2}$@@3@@$\frac{54}{35}$@@$\frac{3}{4}$@@$\frac{1}{28}$@@$\frac{7}{9}$@@60@@$\frac{25}{2}$@@$\frac{7}{6}$@@$\frac{15}{2}$@@$\frac{12}{7}$@@$\frac{16}{5}$@@10@@$\frac{49}{12}$@@10@@$\frac{1}{36}$

2. 解方程。（建议 4 分钟完成）
$\frac{1}{3}x = \frac{1}{5}$ $\frac{4}{5}x = \frac{1}{4}$ $\frac{4}{3}x = \frac{8}{9}$
$6x = \frac{12}{7}$ $\frac{2}{7}x = 8$ $\frac{15}{7}x = \frac{10}{49}$

答案： $x = \frac{3}{5}$@@$x = \frac{5}{16}$@@$x = \frac{2}{3}$@@$x = \frac{2}{7}$@@$x = 28$@@$x = \frac{2}{21}$

用简便方法计算。
$12\div12\frac{12}{13}$ $21\div21\frac{21}{22}$ $68\div34\frac{34}{35}$ ·提升练·

答案： $\frac{13}{14}$@@$\frac{22}{23}$@@$\frac{35}{18}$