题目内容
计算.
(1)4
-
+0.125
(2)2
÷
×
(3)
×
+
×(
+
).
(1)4
11 |
12 |
7 |
8 |
(2)2
5 |
6 |
34 |
9 |
1 |
18 |
(3)
9 |
28 |
7 |
3 |
2 |
3 |
3 |
8 |
5 |
6 |
分析:(1)按照从左向右的顺序进行计算;
(2)按照从左向右的顺序进行计算
(3)根据乘法分配律进行简算.
(2)按照从左向右的顺序进行计算
(3)根据乘法分配律进行简算.
解答:解:
(1)4
-
+0.125,
=4
+0.125,
=4
;
(2)2
÷
×
,
=
×
,
=
;
(3)
×
+
×(
+
),
=
×
+
×
+
×
,
=
+
+
,
=1+
,
=1
.
(1)4
11 |
12 |
7 |
8 |
=4
1 |
24 |
=4
1 |
6 |
(2)2
5 |
6 |
34 |
9 |
1 |
18 |
=
3 |
4 |
1 |
18 |
=
1 |
24 |
(3)
9 |
28 |
7 |
3 |
2 |
3 |
3 |
8 |
5 |
6 |
=
9 |
28 |
7 |
3 |
2 |
3 |
3 |
8 |
2 |
3 |
5 |
6 |
=
3 |
4 |
1 |
4 |
5 |
9 |
=1+
5 |
9 |
=1
5 |
9 |
点评:考查了分数和小数四则混合运算.注意运算顺序和运算法则,然后再进一步计算.
练习册系列答案
相关题目