《2025年阳光同学计算小达人五年级数学下册冀教版》

3. 解方程。
$x - \frac{7}{12} = \frac{11}{12}$ $\frac{2}{3} + x = \frac{3}{4}$ $x - \frac{1}{2} = \frac{5}{8}$
$x + \frac{1}{6} = \frac{3}{4}$ $\frac{7}{15} + x = \frac{29}{30}$ $x - \frac{8}{9} = \frac{1}{6}$

答案： $x = \frac{3}{2}$@@$x = \frac{1}{12}$@@$x = \frac{9}{8}$@@$x = \frac{7}{12}$@@$x = \frac{1}{2}$@@$x = \frac{19}{18}$

4. 计算下面各题，能简算的要简算。
$\frac{7}{17}\times(\frac{2}{5} + \frac{4}{7})$ $\frac{7}{25}\times\frac{5}{6}\times\frac{9}{14}$ $(\frac{5}{8} + \frac{5}{6})\times24$
$\frac{3}{5}\times\frac{7}{6} + \frac{4}{15}$ $\frac{15}{26}\times\frac{13}{20}\times\frac{4}{21}$ $\frac{7}{9}\times13 - \frac{7}{9}\times4$
$\frac{2}{3} + \frac{7}{9}\times\frac{3}{14}$ $(\frac{3}{4} - \frac{1}{5})\times\frac{5}{6}$ $60\times(1 - \frac{4}{9})\times\frac{12}{7}$

答案： $\frac{2}{5}$@@$\frac{3}{20}$@@35@@$\frac{29}{30}$@@$\frac{1}{14}$@@7@@$\frac{5}{6}$@@$\frac{11}{24}$@@$\frac{400}{7}$