第58页 - 江苏版实验班提优训练数学六年级上下册答案

B

C

B

A

$\frac{4}{5}$

$\frac{3}{8}$

0

$\frac{3}{5}$

$\frac{1}{21}$

41

$\frac {3}{5}:0.375=\frac{3}{5}:\frac{3}{8}=8:5=\frac{8}{5}\ $

$0.54:1.6=54:160=27:80=\frac{27}{80}\ $

$\frac {4}{15}:\frac {4}{25}=25:15=5:3=\frac{5}{3}$

$=20×\frac{9}{4}×\frac{4}{25}$

$=45×\frac{4}{25}$

$=\frac{36}{5}$

$=\frac {32}{195}×\frac{13}{2}$

$=\frac{16}{15}$

$ 4×3×2=24(个)$

$答：摆这个长方体一共用了24个小正方体。$