《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3分钟完成）
$\frac{1}{2}×32 =$ $\frac{3}{44}×33 =$ $60×\frac{3}{4} =$ $\frac{8}{15}×5 =$
$\frac{5}{51}×3 =$ $\frac{3}{5}×6 =$ $\frac{4}{25}×25 =$ $8×\frac{7}{16} =$
$\frac{7}{24}×3 =$ $8×\frac{7}{18} =$ $21×\frac{2}{7} =$ $36×\frac{3}{4} =$
$28×\frac{5}{7} =$ $15×\frac{7}{9} =$ $\frac{17}{18}×9 =$ $35×\frac{2}{7} =$
$3×\frac{7}{54} =$ $\frac{11}{45}×9 =$ $\frac{3}{56}×4 =$ $\frac{7}{13}×26 =$
$\frac{4}{21}×3 =$ $\frac{7}{12}×8 =$ $24×\frac{8}{21} =$ $\frac{1}{13}×13 =$

答案： 16@@$\frac{9}{4}$@@45@@$\frac{8}{3}$@@$\frac{5}{17}$@@$\frac{18}{5}$@@4@@$\frac{7}{2}$@@$\frac{7}{8}$@@$\frac{28}{9}$@@6@@27@@20@@$\frac{35}{3}$@@$\frac{17}{2}$@@10@@$\frac{7}{18}$@@$\frac{11}{5}$@@$\frac{3}{14}$@@14@@$\frac{4}{7}$@@$\frac{14}{3}$@@$\frac{64}{7}$@@1

2. 计算下面各题。（建议4分钟完成）
$\frac{2}{5}+\frac{2}{5}+\frac{7}{15}$ $\frac{7}{8}+\frac{5}{9}-\frac{5}{6}$ $1-\frac{6}{11}-\frac{2}{13}$
$\frac{7}{10}+\frac{4}{5}-\frac{11}{15}$ $\frac{3}{4}-\frac{3}{8}+\frac{5}{8}$ $\frac{6}{7}+\frac{5}{6}+\frac{1}{7}$

答案： $\frac{19}{15}$@@$\frac{43}{72}$@@$\frac{43}{143}$@@$\frac{23}{30}$@@1@@$1\frac{5}{6}$

巧算。
$\frac{2}{1×3}+\frac{2}{3×5}+\frac{2}{5×7}+\cdots+\frac{2}{97×99}$

答案： @@$\frac{98}{99}$