题目内容
13
-
×2
-6÷1
.
| 1 |
| 2 |
| 14 |
| 15 |
| 6 |
| 7 |
| 4 |
| 5 |
分析:根据分数四则混合运算的顺序计算,本题先算乘除,然后出现了连减,所以再利用连减的简算,连续减去两个数等于这两个数的各,最后计算出结果.
解答:解:13
-
×2
-6÷1
,
=13
-
×2
-6×
,
=
-
×
-6×
,
=
-
-
,
=
-(
+
),
=
-6,
=7
.
| 1 |
| 2 |
| 14 |
| 15 |
| 6 |
| 7 |
| 4 |
| 5 |
=13
| 1 |
| 2 |
| 14 |
| 15 |
| 6 |
| 7 |
| 5 |
| 9 |
=
| 27 |
| 2 |
| 14 |
| 15 |
| 20 |
| 7 |
| 5 |
| 9 |
=
| 27 |
| 2 |
| 8 |
| 3 |
| 10 |
| 3 |
=
| 27 |
| 2 |
| 8 |
| 3 |
| 10 |
| 3 |
=
| 27 |
| 2 |
=7
| 1 |
| 2 |
点评:此题考查了按分数的四则混合运算的顺序计算.
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