《2025年通城学典计算能手五年级数学下册青岛版五四制》

一、在括号里填上合适的数。
$4:3 = 8:(\ \ \ \ )$ $1.2:8 = 3.6:(\ \ \ \ )$ $0.2:5 = 4:(\ \ \ \ )$
$0.8:0.5 = (\ \ \ \ ):4$ $1.5:3 = (\ \ \ \ ):9$ $0.2:0.1 = (\ \ \ \ ):4$
$2:(\ \ \ \ ) = 6:3.6$ $1:(\ \ \ \ ) = 3:1.5$ $4.8:(\ \ \ \ ) = 1.2:2.4$

答案： 6@@24@@100@@6.4@@4.5@@8@@1.2@@0.5@@9.6

二、解比例。
$8:3.2 = 1.25:x$ $35:x = 0.7:\frac{3}{5}$ $x:4 = \frac{4}{5}:8$
$\frac{1}{6}:\frac{1}{20}=\frac{16}{9}:x$ $\frac{4}{3}:\frac{8}{25}=x:\frac{4}{25}$ $\frac{x}{18}=\frac{26}{3.6}$
$18:x = 3:5$ $\frac{18}{5}:\frac{3}{5}=x:\frac{1}{3}$ $0.24:0.4 = x:5$
$x:84 = \frac{5}{7}:10$ $x:\frac{1}{2}=12:\frac{3}{5}$ $1.2:1.8 = 0.8:x$

答案： $x = 0.5$@@$x = 30$@@$x=\frac{2}{5}$@@$x=\frac{8}{15}$@@$x=\frac{2}{3}$@@$x = 130$@@$x = 30$@@$x = 2$@@$x = 3$@@$x = 6$@@$x = 10$@@$x = 1.2$