化简比. 56:78 1.8:2.4 1

化简比. 56:78 1.8:2.4 1.2吨:750千克.

(1)
5
6
7
8

=(
5
6
×24):(
7
8
:(
7
8
×24),
=20:21;

(2)1.8:2.4,
=(1.8×5):(2.4×5),
=9:12,
=3:4;

(3)1.2吨:750千克,
=1200千克:750千克,
=(1200÷150):(750÷150),
=8:5.
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