题目内容
脱式计算.
(36×17-12)÷15
(2.5-0.125)×0.8+6.24
4÷
×(
-
)
(36×17-12)÷15
(2.5-0.125)×0.8+6.24
4÷
1 |
2 |
5 |
8 |
1 |
4 |
考点:整数四则混合运算,小数四则混合运算
专题:运算顺序及法则
分析:(1)按照先算括号里面的乘法,再算括号里面的减法,最后算括号外面的除法顺序计算解答,
(2)按照先算括号里面的减法,再算乘法,最后算加法顺序解答解答,
(3)按照先算括号里面的减法,再从左到右顺序计算解答.
(2)按照先算括号里面的减法,再算乘法,最后算加法顺序解答解答,
(3)按照先算括号里面的减法,再从左到右顺序计算解答.
解答:
解:(1)(36×17-12)÷15
=(612-12)÷15
=600÷15
=40;
(2)(2.5-0.125)×0.8+6.24
=2.375×0.8+6.24
=1.9+6.24
=8.14;
(3)4÷
×(
-
)
=4÷
×
=8×
=3.
=(612-12)÷15
=600÷15
=40;
(2)(2.5-0.125)×0.8+6.24
=2.375×0.8+6.24
=1.9+6.24
=8.14;
(3)4÷
1 |
2 |
5 |
8 |
1 |
4 |
=4÷
1 |
2 |
3 |
8 |
=8×
3 |
8 |
=3.
点评:明确运算的顺序并正确进行计算,是本题考查知识点.
练习册系列答案
相关题目
下列哪个算式商是两位数( )
A、54□□÷53 |
B、54□□÷7□ |
C、54□□÷2□ |