问题 解答题
6.4:8=
1
6
2
3
=
0.375:0.625=8:
8
9
=
答案

(1)6.4:8,

=(6.4×5):(8×5),

=32:40,

=4:5;

6.4:8,

=4:5,

=4÷5,

=

4
5

(2)

1
6
2
3

=(

1
6
×6):(
2
3
×6),

=1:4;

1
6
2
3

=1:4,

=1÷4,

=

1
4

(3)0.375:0.625,

=(0.375×8):(0.625×8),

=3:5;

0.375:0.625,

=3:5,

=3÷5,

=

3
5

(4)8:

8
9

=(8×9):(

8
9
×9),

=72:8,

=9:1;

8:

8
9

=9:1,

=9÷1,

=9.

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