《2025年王朝霞口算小达人六年级数学上册人教版》

1 求下列各比的比值。
$6.4:8= $ $\frac {1}{6}:\frac {2}{3}= $ $0.375:0.625= $
$8:\frac {8}{9}= $ $\frac {4}{5}:0.6= $ $2.5:0.45= $
$24:\frac {8}{27}= $ $\frac {1}{8}:\frac {1}{4}= $ $\frac {3}{4}:0.25= $
$\frac {5}{8}:15= $ $0.8:\frac {3}{4}= $ $1.5:\frac {3}{5}= $
$140:35= $ $0.4:\frac {2}{3}= $ $\frac {4}{5}:\frac {16}{15}= $
$\frac {3}{5}:\frac {3}{7}= $ $1.7:0.4= $ $0.125:5= $

答案： 1 0.8 0.25 0.6 9 $\frac{4}{3}$ $\frac{50}{9}$ 81 $\frac{1}{2}$ 3 $\frac{1}{24}$ $\frac{16}{15}$ 2.5 4 0.6 $\frac{3}{4}$ $\frac{7}{5}$ 4.25 0.025

2 填一填。
$5:4= ( ) :24$ $1.5:0.18= ( ):18$ $4:7= ( ):21$
$\frac {5}{6}:\frac {2}{3}= 5:( )$ $( ):40= \frac {3}{( )}= 15:( )= 0.6$

答案： 2 30 150 12 4 24 5 25

3 把下列各比化成最简单的整数比。(写出计算过程)
$24:12$ $68:40$ $\frac {1}{5}:\frac {2}{15}$
$8cm:0.4m$ 1时20分:50分 $\frac {1}{5}t:450kg$

答案： 3 2:1 17:10 3:2 1:5 8:5 4:9