题目内容
计算(要求脱式计算)
(1)(5
+18
-7
)÷16
(2)(3
+2
)÷2
-
×2
+5
.
(1)(5
3 |
8 |
1 |
2 |
5 |
24 |
2 |
3 |
(2)(3
1 |
4 |
1 |
6 |
3 |
5 |
2 |
3 |
1 |
4 |
1 |
6 |
分析:(1)括号内通分计算,结果为16
,这时,被除数与除数相同,故结果为1;
(2)先算括号内的和括号外的乘法,再算括号外的除法,最后算减法和加法.
2 |
3 |
(2)先算括号内的和括号外的乘法,再算括号外的除法,最后算减法和加法.
解答:解:(1)(5
+18
-7
)÷16
,
=(5
+18
-7
)÷16
,
=16
÷16
,
=1;
(2)(3
+2
)÷2
-
×2
+5
,
=
×
-
×
+5
,
=
-
+5
,
=5
.
3 |
8 |
1 |
2 |
5 |
24 |
2 |
3 |
=(5
9 |
24 |
12 |
24 |
5 |
24 |
2 |
3 |
=16
2 |
3 |
2 |
3 |
=1;
(2)(3
1 |
4 |
1 |
6 |
3 |
5 |
2 |
3 |
1 |
4 |
1 |
6 |
=
65 |
12 |
5 |
13 |
2 |
3 |
9 |
4 |
1 |
6 |
=
25 |
12 |
3 |
2 |
1 |
6 |
=5
3 |
4 |
点评:脱式计算,掌握运算顺序和运算法则是解题的关键.
练习册系列答案
相关题目