问题 解答题
先化简,再求比值.
4.8:2.82.5千克:1.5吨0.4:
7
10
1千米:500分米.
答案

4.8:2.8,

=(4.8×10):(2.8×10),

=48:28,

=(48÷4):(28÷4),

=12:7;

4.8:2.8,

=4.8÷2.8,

=

12
7

2.5千克:1.5吨,

=2.5千克:1500千克,

=2.5:1500,

=(2.5×10):(1500×10),

=25:15000,

=(25÷25):(15000÷25),

=1:600,

2.5千克:1.5吨,

=2.5千克:15000千克,

=2.5÷15000,

=

1
600

0.4:

7
10

=0.4:0.7,

=(0.4×10):(0.7×10),

=4:7;

0.4:

7
10

=0.4÷

7
10

=

4
7

1千米:500分米,

=10000分米:500分米,

=10000:500,

=(10000÷500):(500÷500),

=20:1;

1千米:500分米,

=10000分米:500分米,

=10000÷500,

=20.

单项选择题
单项选择题