题目内容
先化简比再求比值:
(1)42:28
(2)0.5:0.15
(3)
:
(4)
小时:40分.
(1)42:28
(2)0.5:0.15
(3)
| 7 |
| 8 |
| 5 |
| 6 |
(4)
| 2 |
| 3 |
(1)42:28,
=(42÷14):(28÷14),
=3:2;
42:28,
=3:2,
=3÷2,
=
;
(2)0.5:0.15,
=(0.5×20):(0.15×20),
=10:3;
0.5:0.15,
=10:3,
=10÷3,
=
;
(3)
:
,
=(
×24):(
×24),
=21:20;
:
,
=21:20,
=21÷20,
=
;
(4)
小时:40分,
=40分:40分,
=1:1;
小时:40分,
=1:1,
=1÷1,
=1.
=(42÷14):(28÷14),
=3:2;
42:28,
=3:2,
=3÷2,
=
| 3 |
| 2 |
(2)0.5:0.15,
=(0.5×20):(0.15×20),
=10:3;
0.5:0.15,
=10:3,
=10÷3,
=
| 10 |
| 3 |
(3)
| 7 |
| 8 |
| 5 |
| 6 |
=(
| 7 |
| 8 |
| 5 |
| 6 |
=21:20;
| 7 |
| 8 |
| 5 |
| 6 |
=21:20,
=21÷20,
=
| 21 |
| 20 |
(4)
| 2 |
| 3 |
=40分:40分,
=1:1;
| 2 |
| 3 |
=1:1,
=1÷1,
=1.
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