题目
题型:解答题难度:一般来源:不详
(2)-7-15;
(3)12-(-18)+(-7)-15;
(4)3a2-2a+4a2-7a;
(5)(
1 |
6 |
3 |
4 |
5 |
12 |
(6)-14-
1 |
7 |
(7)6.868×(-5)+6.868×(-12)+17×6.868;
(8)-32-|(-5)3|×(-
2 |
5 |
答案
=-6;
(2)原式=-(7+15)
=-22;
(3)原式=12+18-7-15
=30-22
=8;
(4)原式=7a2-9a;
(5)原式=2-9+5=-2;
(6)原式=-1-
1 |
7 |
=-1+1
=0;
(7)原式=6.868×(-5-12+17)
=0;
(8)原式=-9-125×
4 |
25 |
=-9-20-2
=-31.
核心考点
试题【(1)12+(-18);(2)-7-15;(3)12-(-18)+(-7)-15;(4)3a2-2a+4a2-7a;(5)(16-34+512)×12;(6)-】;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
(1)(
5 |
9 |
3 |
4 |
1 |
18 |
(2)(-1)3-[-1-
1 |
2 |
1 |
3 |