《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。
3.14×0.1² = 0.35×0.12 = $\frac{16}{5}÷\frac{8}{5} =$
3.14×0.07 = 0.36÷3.6 = $\frac{7}{4} + \frac{1}{2} =$
3.14×2 = 0.75 + 0.05 = 2 - $\frac{13}{10} =$
3.14×0.02 = 46×5 = $\frac{2}{3} - \frac{2}{5} =$
3.14×3² = 4.8÷0.24 = $\frac{5}{12}×\frac{9}{10} =$
3.14×1000 = 1.27×0.4 = $\frac{3}{4}÷\frac{1}{4} =$
3.14×0.6 = 0.9 - 0.09 = $\frac{3}{2}×\frac{2}{25} =$
3.14×8 = 0.25×40 = $\frac{26}{5}÷13 =$
3.14×7 = 9.1÷0.13 = $\frac{4}{3} - \frac{1}{4} =$
3.14×0.7 = $\frac{7}{20}×\frac{5}{14} =$ $\frac{1}{2} + \frac{3}{8} =$

答案： 0.0314@@0.042@@2@@0.2198@@0.1@@$\frac{9}{4}$@@6.28@@0.8@@$\frac{7}{10}$@@0.0628@@230@@$\frac{4}{15}$@@28.26@@20@@$\frac{3}{8}$@@3140@@0.508@@3@@1.884@@0.81@@$\frac{3}{25}$@@25.12@@10@@$\frac{2}{5}$@@21.98@@70@@$\frac{13}{12}$@@2.198@@$\frac{1}{8}$@@$\frac{7}{8}$

二、计算下面各题，怎样简便就怎样计算。
125×（17 + 15） 57.5 - 4.25 - 5.75 （25 + 75）÷[63×($\frac{4}{7} - \frac{4}{9}$)]

答案： 4000@@47.5@@12.5