《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**
$\frac{8}{9} \div \frac{16}{17}=$ $\frac{1}{4} + \frac{3}{7}=$ $\frac{2}{5} - \frac{3}{10}=$
$4.28 + 3.2=$ $6.8 \times 9=$ $2.6 \div 0.8=$
$\frac{4}{5} \div \frac{8}{15}=$ $\frac{8}{5} - 1=$ $\frac{2}{5} \div \frac{2}{3}=$
$\frac{7}{12} + \frac{7}{8}=$ $\frac{5}{8} \times 24=$ $4.4 + 16=$
$\frac{6}{5} \div \frac{1}{4}=$ $\frac{3}{14} + \frac{2}{7}=$ $900 \div 15=$
$200 \times 2.6=$ $\frac{3}{4} \div 9=$ $\frac{7}{6} \times \frac{9}{7}=$
$\frac{6}{5} - \frac{3}{10}=$ $78 \times 30=$ $\frac{2}{15} - \frac{1}{30}=$
$15 \div 40=$ $\frac{5}{8} - \frac{3}{10}=$ $\frac{7}{25} \times \frac{5}{7}=$
$\frac{2}{5} \times \frac{5}{8}=$ $\frac{5}{6} + \frac{4}{11}=$ $16 \div \frac{4}{5}=$
$3 - \frac{3}{7}=$ $4 \div \frac{1}{4}=$ $\frac{2}{5} + \frac{1}{2}=$

答案： $\frac{17}{18}$@@$\frac{19}{28}$@@$\frac{1}{10}$@@7.48@@61.2@@3.25@@$\frac{3}{2}$@@$\frac{3}{5}$@@$\frac{3}{5}$@@$\frac{35}{24}$@@15@@20.4@@$\frac{24}{5}$@@$\frac{1}{2}$@@60@@520@@$\frac{1}{12}$@@$\frac{3}{2}$@@$\frac{9}{10}$@@2340@@$\frac{1}{10}$@@$\frac{3}{8}$@@$\frac{13}{40}$@@$\frac{1}{5}$@@$\frac{1}{4}$@@$\frac{79}{66}$@@20@@$2\frac{4}{7}$@@16@@$\frac{9}{10}$

二、计算下面各题，怎样简便就怎样计算**
$12 - 5 \div 9 - \frac{1}{9} \times 13$ $7.43 - 3.6 + 9.57 - 4.4$ $\frac{2}{3} + (\frac{5}{6} - \frac{3}{4}) \div \frac{3}{8}$

答案： 10@@9@@$\frac{8}{9}$