题目内容
4.6×
+8.4÷
-
×5.
| 11 |
| 8 |
| 8 |
| 11 |
| 11 |
| 8 |
分析:把÷
改写成×
,再逆用乘法分配律简算即可.
| 8 |
| 11 |
| 11 |
| 8 |
解答:解:4.6×
+8.4÷
-
×5,
=4.6×
+8.4×
-
×5,
=
×(4.6+8.4-5),
=
×8,
=11.
| 11 |
| 8 |
| 8 |
| 11 |
| 11 |
| 8 |
=4.6×
| 11 |
| 8 |
| 11 |
| 8 |
| 11 |
| 8 |
=
| 11 |
| 8 |
=
| 11 |
| 8 |
=11.
点评:解决此题关键是把原来的算式改写成符合乘法分配律的形式,进而逆用乘法分配律进行简算.
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