当前位置:初中试题 > 数学试题 > 有理数的混合运算 > 计算题:(1)-3-(-4)+7(2)8×(-45)÷|-16|(3)(38-16-34)×(-24)(4)(-2)2-|-6|+2-3×(-13)(5)(-1...
题目
题型:解答题难度:一般来源:不详
计算题:(1)-3-(-4)+7
(2)8×(-
4
5
)÷|-16|

(3)(
3
8
-
1
6
-
3
4
)×(-24)

(4)(-2)2-|-6|+2-3×(-
1
3
)

(5)(-
1
2
)+2×(-0.5)2+32÷(-3)

(6)-32-[-5-0.2÷
4
5
×(-2)2]
答案
(1)-3-(-4)+7
=-3+4+7
=(-3)+(4+7)
=(-3)+11
=+(11-3)
=8;
(2)8×(-
4
5
)÷|-16|

=8×(-
4
5
)÷16

=8×(-
4
5
1
16

=-
4
5
×
1
16

=-
2
5

(3)(
3
8
-
1
6
-
3
4
)×(-24)

=
3
8
×(-24)-
1
6
×(-24)-
3
4
×(-24)
=-9+4+18
=(-9)+(4+18)
=(-9)+22
=+(22-9)
=13;
(4)(-2)2-|-6|+2-3×(-
1
3
)

=4-6+2+1
=(4+2+1)-6
=7-6
=1;
(5)(-
1
2
)+2×(-0.5)2+32÷(-3)

=(-
1
2
)+2×0.25+9÷(-3)
=(-
1
2
)+0.5+(-3)
=[(-0.5)+0.5]+(-3)
=0+(-3)
=-3;
(6)-32-[-5-0.2÷
4
5
×(-2)2]

=-9-[-5-
1
5
×
5
4
×4]
=-9-(-5-1)
=-9-[(-5)+(-1)]
=-9-(-6)
=-9+6
=-(9-6)
=-3.
核心考点
试题【计算题:(1)-3-(-4)+7(2)8×(-45)÷|-16|(3)(38-16-34)×(-24)(4)(-2)2-|-6|+2-3×(-13)(5)(-1】;主要考察你对有理数的混合运算等知识点的理解。[详细]
举一反三
计算:
(1)-10+8÷(-2)2-(-4)×(-3);
(2)|-1|+32×(-
2
3
)2-(-1)3
题型:解答题难度:一般| 查看答案
(1)0.25×(-2)3-[4÷(-
2
3
)
2
+1]+(-1)2010

(2)-1100-(1-0.5)×
1
3
×[3-(-3)2]

(3)(-
1
6
+
3
4
-
1
12
)÷(
1
48
)

(4)(-
18
7
m3n-6nm)-(
3
7
nm3-6mn)
题型:解答题难度:一般| 查看答案
求下列式子的值.
(1)-
4
5
×[(-
1
2
)÷(0.75-1)+(-2)5]

(2)(-3)2÷2
1
4
×(-
2
3
)2+4-22×(-
1
3
)
题型:解答题难度:一般| 查看答案
计算:-22×
1
2
+5×(-6)-(-4)2÷(2-10)
题型:解答题难度:一般| 查看答案
计算:-24+(3-7)2-23÷


16
81
×
3(
4
9
)
3
 

题型:解答题难度:一般| 查看答案
版权所有 CopyRight © 2012-2019 超级试练试题库 All Rights Reserved.