问题
解答题
化简比: 0.2:4 16米:12厘米 76:19
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答案
0.2:4,
=(0.2×5):(4×5),
=1:20;
16米:12厘米,
=1600厘米:12厘米,
=1600:12,
=(1600÷4):(12÷4),
=400:3;
76:19,
=(76÷19):(19÷19),
=4:1;
:1 2
,3 4
=(
×4):(1 2
×4),3 4
=2:3;
:4 5
,8 15
=(
×4 5
):(15 4
×8 15
),15 4
=3:2.