《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。
$1.6\div0.32=$ $0.9 + 9.09=$ $7 - 0.77=$
$0.45\times0.6=$ $24.4\div0.4=$ $1.14\div0.19=$
$4.26 + 0.83=$ $3.8\times0.4=$ $\frac{11}{12}+\frac{1}{6}=$
$9 - 2.34=$ $\frac{3}{7}-\frac{3}{8}=$ $2.4\div0.75=$
$\frac{8}{5}\div4=$ $\frac{1}{8}+\frac{2}{9}=$ $\frac{1}{15}\div\frac{1}{3}=$
$\frac{7}{9}\times\frac{45}{46}=$ $\frac{3}{4}\div\frac{11}{12}=$ $2\frac{1}{5}\times\frac{15}{44}=$
$50\%\div\frac{6}{7}=$ $300\times10\%=$ $272\div17=$
$9.2 - 1.52=$ $\frac{1}{3}+\frac{7}{15}=$ $20.8\% - 8\%=$
$0.78\div10=$ $5\%\div5=$ $1.08 + 12\%=$
$\frac{9}{10}+\frac{21}{10}=$ $\frac{2}{5}-\frac{1}{20}=$ $200\times\frac{1}{4}=$

答案： 5@@9.99@@6.23@@0.27@@61@@6@@5.09@@1.52@@$\frac{13}{12}$@@6.66@@$\frac{3}{56}$@@3.2@@$\frac{2}{5}$@@$\frac{25}{72}$@@$\frac{1}{5}$@@$\frac{35}{46}$@@$\frac{9}{11}$@@$\frac{3}{4}$@@$\frac{7}{12}$@@30@@16@@7.68@@$\frac{4}{5}$@@12.8%@@0.078@@0.01@@1.2@@3@@$\frac{7}{20}$@@50

二、解比例。
$x:12=\frac{7}{4}:2.8$ $70\%:x=1.4:0.6$ $\frac{1}{4}:\frac{5}{9}=\frac{3}{10}:x$

答案： $x = 7.5$@@$x = 0.3$@@$x = \frac{2}{3}$