《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。
1.8÷0.5 = 1.05 + 3.4 = 3.14×2² =
50×3.14 = 12÷$\frac{2}{3} =$ 9.9 + 1.12 =
$\frac{1}{5}÷\frac{1}{30} =$ $\frac{2}{3} + \frac{1}{7} =$ 2.25÷0.45 =
$\frac{3}{49}×\frac{7}{4} =$ $\frac{14}{15} - \frac{4}{5} =$ 3.14×0.05 =
$\frac{1}{4} - \frac{1}{10} =$ $\frac{5}{6} + \frac{3}{8} =$ 4.17 - 2 =
$\frac{1}{2}÷\frac{2}{5} =$ $\frac{1}{10} + \frac{3}{2} =$ 8.5÷0.17 =
$\frac{3}{5} + \frac{1}{6} =$ 78÷13 = 925 - 840 =
$\frac{1}{2}×\frac{7}{10} =$ $\frac{17}{9}÷\frac{68}{3} =$ 3.14 - 2.4 =
2÷$\frac{1}{8} =$ 6 - $\frac{5}{9} =$ 3²×3.14 =
$\frac{3}{2}÷\frac{3}{5} =$ $\frac{1}{8}÷\frac{1}{200} =$ 3.14×10² =

答案： 3.6@@4.45@@12.56@@157@@18@@11.02@@6@@$\frac{17}{21}$@@5@@$\frac{3}{28}$@@$\frac{2}{15}$@@0.157@@$\frac{3}{20}$@@$\frac{29}{24}$@@2.17@@$\frac{5}{4}$@@$\frac{8}{5}$@@50@@$\frac{23}{30}$@@6@@85@@$\frac{7}{20}$@@$\frac{1}{12}$@@0.74@@16@@$5\frac{4}{9}$@@28.26@@$\frac{5}{2}$@@25@@314

二、计算下面各题，怎样简便就怎样计算。
$\frac{4}{9} + \frac{5}{9} - 0.625 - 0.375$ ($\frac{1}{15} + \frac{1}{25}$)×15×25 $\frac{3}{20}÷[\frac{1}{2}×(\frac{4}{5} + \frac{2}{5})]$

答案： 0@@40@@$\frac{1}{4}$