《2025年通城学典计算能手五年级数学下册青岛版五四制》

一、口算。
0.314×10² = 4÷$\frac{1}{9} =$ 80×$\frac{2}{5} =$
3.14×9 = $\frac{5}{6}÷\frac{11}{12} =$ $\frac{5}{6} - \frac{1}{3} =$
3.14×0.3² = 2 - 0.27 = $\frac{7}{9}×\frac{45}{21} =$
3.14×20 = 46.8×100 = $\frac{1}{20}÷\frac{4}{5} =$
3.14×2² = 2.75 + 3.25 = $\frac{7}{20}÷\frac{1}{5} =$
0.314×30 = 0.125×8 = $\frac{5}{16}÷\frac{5}{48} =$
3.14×0.2² = 0.39÷1.3 = 1 - $\frac{5}{7} =$
3.14×10 = 3.65 + 0.4 = $\frac{1}{9} + \frac{1}{6} =$
3.14×0.8 = 12×0.75 = $\frac{4}{7}×\frac{3}{2} =$
3.14×6 = 8600 - 1200 = 20×$\frac{5}{8} =$

答案： 31.4@@36@@32@@28.26@@$\frac{10}{11}$@@$\frac{1}{2}$@@0.2826@@1.73@@$\frac{5}{3}$@@62.8@@4680@@$\frac{1}{16}$@@12.56@@6@@$\frac{7}{4}$@@9.42@@1@@3@@0.1256@@0.3@@$\frac{2}{7}$@@31.4@@4.05@@$\frac{5}{18}$@@2.512@@9@@$\frac{6}{7}$@@18.84@@7400@@$\frac{25}{2}$

二、计算下面各题，怎样简便就怎样计算。
$8×\frac{3}{4} - 3÷\frac{4}{3} - \frac{3}{4}$        4.7×$\frac{7}{6} + 1.3÷\frac{6}{7}$         $\frac{3}{22}÷[\frac{2}{3}÷(\frac{2}{3} + 0.8)]$

答案： 3@@7@@$\frac{3}{10}$