3.5:
| 5 |
| 7 |
| 1 |
| 20 |
| 1 |
| 5 |
20:60:150.(1)3.5:
| 5 |
| 7 |
=(3.5×7):(
| 5 |
| 7 |
=24.5:5,
=(24.5×10):(5×10),
=245:50,
=(245÷5):(50÷5),
=49:10;
(2)
| 1 |
| 20 |
| 1 |
| 5 |
=(
| 1 |
| 20 |
| 1 |
| 5 |
=1:4;
(3)20:60:150,
=(20÷10):(60÷10):(150÷10),
=2:6:15.
编辑:chaxungu时间:2026-04-27 14:12:02分类:小学数学题库
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