题目内容
(
+
×99)÷
.
| 2 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
(
+
×99)÷
=(
+
×99)×
=
×
+
×99×
=1+
×
×99
=1+1×99
=1+99
=100.
| 2 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
=(
| 2 |
| 5 |
| 2 |
| 5 |
| 5 |
| 2 |
=
| 2 |
| 5 |
| 5 |
| 2 |
| 2 |
| 5 |
| 5 |
| 2 |
=1+
| 2 |
| 5 |
| 5 |
| 2 |
=1+1×99
=1+99
=100.
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