《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。
1.9 - 0.09 = 2.4 + 0.56 = 300÷15 =
3.75×4 = 7.5×0.04 = 4 - 2.31 =
130÷6.5 = 72÷0.8 = 9÷21 =
$\frac{5}{12}×\frac{4}{5} =$ $3 - \frac{3}{2} =$ 3.55 + 7.45 =
$\frac{2}{3}÷\frac{8}{9} =$ $\frac{5}{9}÷\frac{5}{11} =$ 4.4÷0.22 =
$\frac{1}{2}×\frac{1}{4} =$ $\frac{3}{5} + \frac{9}{20} =$ 1.5×400 =
$\frac{3}{8} + \frac{3}{4} =$ $\frac{1}{4}÷\frac{1}{64} =$ 360÷40 =
$\frac{4}{5}×\frac{3}{4} =$ $\frac{1}{7} - \frac{1}{9} =$ $\frac{3}{5}×\frac{10}{39} =$
$\frac{2}{5} + \frac{7}{10} =$ $\frac{3}{4}×\frac{32}{33} =$ 190 - 98 =
$\frac{5}{12} - \frac{1}{4} =$ $\frac{7}{27}÷\frac{7}{9} =$ 125×$\frac{2}{5} =$

答案： 1.81@@2.96@@20@@15@@0.3@@1.69@@20@@90@@$\frac{3}{7}$@@$\frac{1}{3}$@@$\frac{3}{2}$@@11@@$\frac{3}{4}$@@$\frac{11}{9}$@@20@@$\frac{1}{8}$@@$\frac{21}{20}$@@600@@$\frac{9}{8}$@@16@@9@@$\frac{3}{5}$@@$\frac{2}{63}$@@$\frac{2}{13}$@@$\frac{11}{10}$@@$\frac{8}{11}$@@92@@$\frac{1}{6}$@@$\frac{1}{3}$@@50

二、计算下面各题，怎样简便就怎样计算。
$6÷\frac{3}{5} - \frac{3}{5}÷6$          0.25×32×1.25                $\frac{4}{5}÷[(\frac{5}{8} - 0.5)÷\frac{5}{8}]$

答案： $9\frac{9}{10}$@@10@@4