计算:(1)5×(10-5)(2)(2048-827+212)÷6(3)(6x4-2x1x)÷3x(4)(82-36)÷22-(3-1)2.

计算:(1)5×(10-5)(2)(2048-827+212)÷6(3)(6x4-2x1x)÷3x(4)(82-36)÷22-(3-1)2.

题型:解答题难度:一般来源:不详
计算:
(1)


5
×(


10
-


5
)

(2)(20


48
-8


27
+2


12


6

(3)(6


x
4
-2x


1
x
)÷3


x

(4)(8


2
-3


6
)÷2


2
-(


3
-1)2
答案
(1)原式=


5
×


10
-


5
×


5

=5


2
-5;

(2)原式=(80


3
-24


3
+4


3
)÷


6

=60


3
÷


6

=30


2


(3)原式=(3


x
-2


x
)÷3


x

=


x
÷3


x

=
1
3


(4)原式=8


2
÷2


2
-3


6
÷2


2
-(3-2


3
+1)
=4-
3


3
2
-4+2


3

=


3
2
举一反三
下列计算正确的是(  )
A.


3
-


3
=0
B.


3
+


3
=


3
C.


3
×


3
=


6
D.


3
÷


3
=3
题型:单选题难度:简单| 查看答案
计算:5


1
5
+
1
2


20
-


5
4
×


4
5
+


45
÷


5
题型:解答题难度:一般| 查看答案


12
-


6


3
-


21
×


14
3
题型:解答题难度:一般| 查看答案
计算:(3


2
+


6
)(3


2
-


6


36
题型:解答题难度:一般| 查看答案
计算:(2-


5
)(2+


5
)=______.
题型:填空题难度:简单| 查看答案
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