题目内容
怎样算简便就怎样算．
[
-（
-
）]×
（
-
）÷（2-
）4.86×99+4.86．
[
| 7 |
| 9 |
| 7 |
| 9 |
| 9 |
| 16 |
| 8 |
| 27 |
| 11 |
| 12 |
| 3 |
| 4 |
| 1 |
| 2 |
（1）[
-（
-
）]×
=[
-
+
]×
=
×
=
；
（2）（
-
）÷（2-
）
=
÷
=
；
（3）4.86×99+4.86
=4.86×（99+1）
=4.86×100
=486．
| 7 |
| 9 |
| 7 |
| 9 |
| 9 |
| 16 |
| 8 |
| 27 |
=[
| 7 |
| 9 |
| 7 |
| 9 |
| 9 |
| 16 |
| 8 |
| 27 |
=
| 9 |
| 16 |
| 8 |
| 27 |
=
| 1 |
| 6 |
（2）（
| 11 |
| 12 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 1 |
| 6 |
| 3 |
| 2 |
=
| 1 |
| 9 |
（3）4.86×99+4.86
=4.86×（99+1）
=4.86×100
=486．
练习册系列答案
相关题目
