《2025年阳光同学计算小达人五年级数学下册冀教版》

1. 在括号里填上合适的数。（建议3分钟完成）
$2\ m^{3}=(\ \ \ \ )dm^{3}$ $3150\ dm^{3}=(\ \ \ \ )m^{3}$
$300\ cm^{3}=(\ \ \ \ )dm^{3}$ $9.71\ dm^{3}=(\ \ \ \ )cm^{3}$
$2\ m^{3}300\ dm^{3}=(\ \ \ \ )m^{3}$ $50800\ cm^{3}=(\ \ \ \ )L$
$4.68\ dm^{3}=(\ \ \ \ )L=(\ \ \ \ )mL$ $70000\ cm^{3}=(\ \ \ \ )dm^{3}=(\ \ \ \ )m^{3}$
$7.09\ dm^{3}=(\ \ \ \ )dm^{3}(\ \ \ \ )cm^{3}$ $1.56\ dm^{3}=(\ \ \ \ )dm^{3}(\ \ \ \ )cm^{3}$

答案： 2000@@3.15@@0.3@@9710@@2.3@@50.8@@4.68@@4680@@70@@0.07@@7@@90@@1@@560

2. 计算下面各题，能简算的要简算。（建议6分钟完成）
$(21 + \frac{7}{6})\times\frac{8}{7}$ $\frac{13}{24}\times\frac{3}{2}\times\frac{2}{13}$ $\frac{7}{15}\times\frac{18}{19}+\frac{7}{19}\times\frac{1}{15}$
$\frac{12}{5}\times(\frac{5}{13}+\frac{3}{4})$ $\frac{5}{6}\times\frac{8}{17}\times\frac{17}{20}$ $24\times\frac{37}{43}+37\times\frac{19}{43}$
$48\times(\frac{5}{12}+\frac{7}{8})$ $\frac{8}{15}\times(\frac{7}{6}-\frac{3}{4})$ $8\times\frac{11}{8}-\frac{8}{11}\times\frac{1}{4}$

答案： $25\frac{1}{3}$@@$\frac{1}{8}$@@$\frac{7}{15}$@@$\frac{177}{65}$@@$\frac{1}{3}$@@37@@62@@$\frac{2}{9}$@@$10\frac{9}{11}$