题目内容
(2012?屯留县模拟)脱式计算
(1)6760÷13+17×25
(2)4.82-5.2÷0.8×0.6
(3)
-
÷
(4)35÷
×1-
.
(1)6760÷13+17×25
(2)4.82-5.2÷0.8×0.6
(3)
5 |
6 |
3 |
4 |
3 |
10 |
(4)35÷
7 |
8 |
2 |
7 |
分析:按照先算除法,再算乘法,最后算加减法的运算顺序计算即可.
解答:解:(1)6760÷13+17×25,
=520+17×25,
=520+425,
=945;
(2)4.82-5.2÷0.8×0.6,
=4.82-6.5×0.6,
=4.82-3.9,
=0.92;
(3)
-
÷
,
=
-
,
=-
;
(4)35÷
×1-
,
=40×1-
,
=40-
,
=39
.
=520+17×25,
=520+425,
=945;
(2)4.82-5.2÷0.8×0.6,
=4.82-6.5×0.6,
=4.82-3.9,
=0.92;
(3)
5 |
6 |
3 |
4 |
3 |
10 |
=
5 |
6 |
5 |
2 |
=-
5 |
3 |
(4)35÷
7 |
8 |
2 |
7 |
=40×1-
2 |
7 |
=40-
2 |
7 |
=39
5 |
7 |
点评:四则混合运算的顺序:1、如果是同一级运算,一般按从左往右依次进行计算;2、如果既有加减、又有乘除法,先算乘除法、再算加减; 3、如果有括号,先算括号里面的; 4、如果符合运算定律,可以利用运算定律进行简算.
练习册系列答案
相关题目