题目内容
| 化简比和求比值. 4:16 | 5.6:4.2 | 75:15 | ||||||
| 12.5%:0.5 |
|
(1)4:16,
=(4÷4):(16÷4),
=1:4;
4:16=1:4=1÷4=
.
(2)5.6:4.2,
=(5.6×10÷14):(4.2×10÷14),
=4:3;
5.6:4.2=4:3=4÷3=
.
(3)75:15,
=(75÷15):(15÷15),
=5:1;
75:15=5:1=5÷1=5.
(4)
:
,
=(
×21):(
×21),
=9:9,
=1:1;
:
=1:1=1÷1=1.
(5)12.5%:0.5,
=(0.125×8):(0.5×8),
=1:4;
12.5%:0.5=1:4=1÷4=
.
(6)
:37.5%,
=(
×8):(
×8),
=12:3,
=4:1;
:37.5%=4:1=4÷1=4.
=(4÷4):(16÷4),
=1:4;
4:16=1:4=1÷4=
| 1 |
| 4 |
(2)5.6:4.2,
=(5.6×10÷14):(4.2×10÷14),
=4:3;
5.6:4.2=4:3=4÷3=
| 4 |
| 3 |
(3)75:15,
=(75÷15):(15÷15),
=5:1;
75:15=5:1=5÷1=5.
(4)
| 3 |
| 7 |
| 9 |
| 21 |
=(
| 3 |
| 7 |
| 9 |
| 21 |
=9:9,
=1:1;
| 3 |
| 7 |
| 9 |
| 21 |
(5)12.5%:0.5,
=(0.125×8):(0.5×8),
=1:4;
12.5%:0.5=1:4=1÷4=
| 1 |
| 4 |
(6)
| 3 |
| 2 |
=(
| 3 |
| 2 |
| 3 |
| 8 |
=12:3,
=4:1;
| 3 |
| 2 |
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