题目内容
脱式计算
(1)(
|
(2)(
| ||||||||||||||||
(3)
|
(4)31
|
分析:(1)(2)(4)依据四则运算计算顺序解答,
(3)运用乘法分配律解答.
(3)运用乘法分配律解答.
解答:解:(1)(
+
)÷(
×
),
=
÷
,
=1
;
(2)(
-
+
)÷
,
=(
+
)÷
,
=
÷
,
=1
;
(3)
×
+
÷
,
=(
+
)×
,
=1×
,
=
;
(4)31
×
+1
×
,
=26+1,
=27.
5 |
4 |
5 |
4 |
5 |
4 |
5 |
4 |
=
5 |
2 |
25 |
16 |
=1
3 |
5 |
(2)(
2 |
3 |
2 |
11 |
1 |
2 |
1 |
2 |
=(
16 |
33 |
1 |
2 |
1 |
2 |
=
65 |
66 |
1 |
2 |
=1
32 |
33 |
(3)
3 |
5 |
7 |
15 |
8 |
15 |
5 |
3 |
=(
7 |
15 |
8 |
15 |
3 |
5 |
=1×
3 |
5 |
=
3 |
5 |
(4)31
1 |
5 |
5 |
6 |
1 |
8 |
8 |
9 |
=26+1,
=27.
点评:本题主要考查学生依据四则运算计算顺序,以及运用乘法分配律解决问题的能力,注意计算结果的准确性.
练习册系列答案
相关题目