《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。
$\frac{1}{4} \div \frac{1}{9} =$ $\frac{2}{3} - \frac{1}{9} =$ $75\% \times \frac{1}{5} =$
$0.1 \times 0.35 =$ $0.05 \times 40 =$ $3.6 - \frac{7}{10} =$
$18.84 + 1.16 =$ $0.96 \div 0.4 =$ $3.75 - 2.8 =$
$\frac{3}{8} + \frac{1}{2} =$ $\frac{3}{2} \times \frac{8}{21} =$ $\frac{7}{20} \div 1.4 =$
$2.5 \times 0.36 =$ $\frac{3}{10} \div \frac{4}{15} =$ $\frac{7}{9} - \frac{4}{15} =$
$3.5 \div 70 =$ $0.95 \times 0.02 =$ $459 + 98 =$
$5.5 - 0.28 =$ $1.1 - 0.75 =$ $\frac{5}{8} \div \frac{5}{14} =$
$280 \times 5 =$ $46 \div 10\% =$ $0.01^2 =$
$50 \times 30\% =$ $\frac{2}{3} \times \frac{5}{32} =$ $0.13 + 0.7 =$
$\frac{1}{2} + \frac{4}{9} =$ $\frac{7}{9} \div \frac{1}{3} =$ $3.14 \times 0.5 =$

答案： $\frac{9}{4}$@@$\frac{5}{9}$@@$\frac{3}{20}$@@0.035@@2@@2.9@@20@@2.4@@0.95@@$\frac{7}{8}$@@$\frac{4}{7}$@@$\frac{1}{4}$@@0.9@@$\frac{9}{8}$@@$\frac{23}{45}$@@0.05@@0.019@@557@@5.22@@0.35@@$\frac{7}{4}$@@1400@@460@@0.0001@@15@@$\frac{5}{48}$@@0.83@@$\frac{17}{18}$@@$\frac{7}{3}$@@1.57

二、计算下面各题，怎样简便就怎样计算。
$\frac{5}{16} \div (\frac{7}{8} - 25\%) + \frac{3}{4}$ $(\frac{1}{4} + \frac{1}{6} - \frac{1}{12}) \div \frac{1}{48}$ $5.8 \times [1 + (2.1 - 2.09)]$

答案： $\frac{5}{4}$@@16@@5.858