求下面各比的比值28:14 5:4 6342 34:58
求下面各比的比值28:145:4634234:58....
求下面各比的比值28:14 5:4 6342 34:58.
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挚爱小慧284
2014-11-03
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(1)28:14,
=(28÷14):(14÷14),
=2:1,
28:14,
=28÷14,
=2;
(2)5:4,
因为5和4就是互质数,
所以最简整数比仍然是:5:4,
5:4,
=5÷4,
=
;
(3)
,
=63:42,
=(63÷21):(42÷21),
=3:2,
=63÷42,
=1.5;
(4)
:
,
=(
×8):(
×8),
=6:5;
:
,
=
÷
,
=
×
,
=
.
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