题目内容
计算下列各题.
(1)1.8×
÷1
(2)5
×1.25-
÷3
(3)9×
+6÷
(4)2
÷1
-1
×
(5)
×0.75+(1-
)÷
.
(1)1.8×
| 4 |
| 5 |
| 11 |
| 25 |
(2)5
| 1 |
| 3 |
| 3 |
| 4 |
(3)9×
| 2 |
| 3 |
| 2 |
| 3 |
(4)2
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 8 |
| 2 |
| 27 |
(5)
| 1 |
| 5 |
| 4 |
| 5 |
| 2 |
| 5 |
分析:根据四则运算的计算顺序,在一个算式中先算第二级运算,再算第一级运算,有括号的要先算括号里的.
解答:解:(1)1.8×
÷1
,
=
×
,
=1,
(2)5
×1.25-
÷3
=
-
,
=
,
(3)9×
+6÷
=6+9,
=15,
(4)2
÷1
-1
×
,
=
-
,
=
,
(5)
×0.75+(1-
)÷
,
=
×0.75+
÷
,
=0.15+0.5,
=0.65.
| 4 |
| 5 |
| 11 |
| 25 |
=
| 36 |
| 25 |
| 25 |
| 36 |
=1,
(2)5
| 1 |
| 3 |
| 3 |
| 4 |
=
| 20 |
| 3 |
| 1 |
| 4 |
=
| 77 |
| 12 |
(3)9×
| 2 |
| 3 |
| 2 |
| 3 |
=6+9,
=15,
(4)2
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 8 |
| 2 |
| 27 |
=
| 4 |
| 3 |
| 1 |
| 12 |
=
| 5 |
| 4 |
(5)
| 1 |
| 5 |
| 4 |
| 5 |
| 2 |
| 5 |
=
| 1 |
| 5 |
| 1 |
| 5 |
| 2 |
| 5 |
=0.15+0.5,
=0.65.
点评:本题综合考查了学生的计算能力,一定要认真细心.
练习册系列答案
相关题目