题目内容
(1)
-(
-
)÷
(2)
÷[
×(
+
)].
| 2 |
| 3 |
| 5 |
| 6 |
| 3 |
| 4 |
| 3 |
| 8 |
(2)
| 5 |
| 14 |
| 6 |
| 7 |
| 4 |
| 9 |
| 1 |
| 6 |
分析:(1)先算小括号内的减法,再算除法,最后算减法;
(2)先算加法,再算乘法,最后算除法.
(2)先算加法,再算乘法,最后算除法.
解答:解:(1)
-(
-
)÷
=
-
×
=
-
=
;
(2)
÷[
×(
+
)]
=
÷[
×
]
=
×
=
.
| 2 |
| 3 |
| 5 |
| 6 |
| 3 |
| 4 |
| 3 |
| 8 |
=
| 2 |
| 3 |
| 1 |
| 12 |
| 8 |
| 3 |
=
| 2 |
| 3 |
| 2 |
| 9 |
=
| 4 |
| 9 |
(2)
| 5 |
| 14 |
| 6 |
| 7 |
| 4 |
| 9 |
| 1 |
| 6 |
=
| 5 |
| 14 |
| 6 |
| 7 |
| 11 |
| 18 |
=
| 5 |
| 14 |
| 21 |
| 11 |
=
| 15 |
| 22 |
点评:此题考查分数四则混合运算的计算,主要搞清运算顺序,正确按顺序计算即可.
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