题目内容
化简比.
①2.5:0.45②24:
③
:
④
:0.25.
①2.5:0.45②24:
| 8 |
| 27 |
③
| 1 |
| 8 |
| 1 |
| 4 |
| 3 |
| 4 |
①2.5:0.45=(2.5×100):(0.45×100)=250:45=(250÷5):(45÷5)=50:9;
②24:
=(24×27):(
×27)=648:8=(648÷8):(8÷8)=81:1;
③
:
=(
×8):(
×8)=1:2;
④
:0.25=
:
=
:
=(
×4):(
×4)=3:1.
②24:
| 8 |
| 27 |
| 8 |
| 27 |
③
| 1 |
| 8 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 4 |
④
| 3 |
| 4 |
| 3 |
| 4 |
| 25 |
| 100 |
| 3 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 4 |
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