题目内容
| 3 |
| 5 |
| 1 |
| 2 |
| 1 |
| 4 |
分析:先算
的倒数,1÷
;
的倒数,1÷
;所得的和除以
的倒数即可.
| 3 |
| 5 |
| 3 |
| 5 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 4 |
解答:解:
(1÷
+1÷
)÷(1÷
),
=(
+2)÷4,
=
÷4,
=
.
答:是
.
(1÷
| 3 |
| 5 |
| 1 |
| 2 |
| 1 |
| 4 |
=(
| 5 |
| 3 |
=
| 11 |
| 3 |
=
| 11 |
| 12 |
答:是
| 11 |
| 12 |
点评:根据题意,先弄清运算顺序,然后再列式解答.
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