题目内容
| 计算题. 23-
| (1+
| 8×
| ||||||||||||||||||||||||
(
|
|
|
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)按照先算乘法,再算除法,最后算减法顺序计算解答,
(2)按照先同时算括号里面的,再算括号外面的顺序计算解答,
(3)按照先同时计算乘法和除法,再算加法顺序计算解答,
(4)(5)(6)按照先算括号里面的,再算第二级运算,最后算第一级运算顺序计算解答.
(2)按照先同时算括号里面的,再算括号外面的顺序计算解答,
(3)按照先同时计算乘法和除法,再算加法顺序计算解答,
(4)(5)(6)按照先算括号里面的,再算第二级运算,最后算第一级运算顺序计算解答.
解答:
解:(1)23-
×
÷
=23-
÷
=23-9
=14;
(2)(1+
)÷(1-
)
=1
÷
=3;
(3)8×
+
÷4
=
+
=6
;
(4)(
-
)÷
+
=
÷
+
=
+
=1;
(5)
+(
-
)÷
=
+
÷
=
+
=1
;
(6)
+(
+
)×
=
+
×
=
+
=
.
| 8 |
| 9 |
| 3 |
| 8 |
| 1 |
| 27 |
=23-
| 1 |
| 3 |
| 1 |
| 27 |
=23-9
=14;
(2)(1+
| 1 |
| 2 |
| 1 |
| 2 |
=1
| 1 |
| 2 |
| 1 |
| 2 |
=3;
(3)8×
| 5 |
| 6 |
| 2 |
| 5 |
=
| 20 |
| 3 |
| 1 |
| 10 |
=6
| 23 |
| 30 |
(4)(
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 6 |
=
| 1 |
| 12 |
| 1 |
| 2 |
| 5 |
| 6 |
=
| 1 |
| 6 |
| 5 |
| 6 |
=1;
(5)
| 15 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
=
| 15 |
| 16 |
| 3 |
| 16 |
| 1 |
| 2 |
=
| 15 |
| 16 |
| 3 |
| 8 |
=1
| 5 |
| 16 |
(6)
| 2 |
| 3 |
| 4 |
| 7 |
| 1 |
| 2 |
| 7 |
| 25 |
=
| 2 |
| 3 |
| 15 |
| 14 |
| 7 |
| 25 |
=
| 2 |
| 3 |
| 3 |
| 10 |
=
| 29 |
| 30 |
点评:本题主要考查学生依据四则运算计算方法正确进行计算的能力,关键是计算结果要准确.
练习册系列答案
相关题目