《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。
3.14×0.2² = 14.28÷7 = 63 - 38 =
3.14×0.07 = 0.25×40 = 0.72×0.4 =
3.14×80 = 1.35 + 0.5 = 0.7÷0.35 =
3.14×60 = 578 - 198 = 0.3×2.2 =
3.14×2000 = 0.75 - 0.35 = 0.42÷7 =
3.14×20² = $\frac{7}{11}×33 =$ 8.2 + 2.8 =
3.14×20 = $\frac{4}{15}÷\frac{2}{5} =$ $\frac{5}{6}×\frac{3}{5} =$
3.14×0.5 = 306×5 = $\frac{2}{3} - \frac{2}{5} =$
3.14×8 = $\frac{3}{2} - \frac{1}{5} =$ 400×$\frac{2}{5} =$
3.14×700 = 20÷40 = $\frac{9}{4} - 2 =$

答案： 0.1256@@2.04@@25@@0.2198@@10@@0.288@@251.2@@1.85@@2@@188.4@@380@@0.66@@6280@@0.4@@0.06@@1256@@21@@11@@62.8@@$\frac{2}{3}$@@$\frac{1}{2}$@@1.57@@1530@@$\frac{4}{15}$@@25.12@@$\frac{13}{10}$@@160@@2198@@0.5@@$\frac{1}{4}$

二、计算下面各题，怎样简便就怎样计算。
$\frac{5}{11}×\frac{4}{9} + \frac{4}{9}×\frac{6}{11}$ 17.68÷5.2 + 3.7×1.5 17×($\frac{2}{17} + 5÷13$)×13

答案： $\frac{4}{9}$@@8.95@@111