《2025年通城学典计算能手五年级数学下册青岛版五四制》

一、解比例。
$36:x=\frac{3}{10}:\frac{5}{3}$ $x:\frac{5}{4}=\frac{9}{10}:\frac{3}{4}$ $\frac{x}{60}=8.4:1.6$
$\frac{0.1}{0.01}=\frac{100}{x}$ $1.6\div\frac{1}{8}=x:0.5$ $13.5:6=x:4$
$x:120=4.2:2.1$ $\frac{5}{6}:\frac{2}{5}=\frac{1}{4}:x$ $x:\frac{24}{5}=\frac{3}{4}:\frac{12}{7}$
$20\%:50\%=x:7.5$ $x:25\%=800:\frac{2}{3}$ $\frac{1}{4}:\frac{1}{8}=x:\frac{1}{12}$
$4:9=x:81$ $\frac{1}{10}:x=\frac{1}{8}:\frac{1}{4}$ $(3 + x):5=13:10$

答案： $x = 200$@@$x = \frac{3}{2}$@@$x = 315$@@$x = 10$@@$x = 6.4$@@$x = 9$@@$x = 240$@@$x = \frac{3}{25}$@@$x = \frac{21}{10}$@@$x = 3$@@$x = 300$@@$x = \frac{1}{6}$@@$x = 36$@@$x = \frac{1}{5}$@@$x = 3.5$