题目
题型:解答题难度:一般来源:不详
3 |
4 |
2 |
3 |
1 |
3 |
(2)(-81)÷2
1 |
4 |
4 |
9 |
(3)
6 |
5 |
1 |
3 |
1 |
2 |
5 |
4 |
(4)-24+(3-7)2-2×(-12)
(5)(-0.3)2÷(-0.9)-|(-3)2-22|
(6)-12-|0.5-
2 |
3 |
1 |
3 |
答案
1 |
2 |
1 |
4 |
=5
3 |
4 |
(2)原式=-81×
4 |
9 |
4 |
9 |
1 |
16 |
=1;
(3)原式=(-
2 |
5 |
3 |
5 |
4 |
5 |
=-
4 |
5 |
(4)原式=-16+16+2
=-2;
(5)原式=0.09÷(-0.9)-5
=-0.1-5
=-5.1;
(6)原式=-1-
1 |
6 |
=-
27 |
2 |
核心考点
举一反三
(1)14-(-12)-17+(-25)
(2)(-8)÷
2 |
3 |
1 |
2 |
(3)(-1)2009+(-3)×|-
2 |
9 |
1 |
2 |
A.若a是有理数,则-a一定是负数 |
B.两个有理数的和不一定大于这两个有理数的差 |
C.0是最小的正整数 |
D.若|a|+a=0,则a<0 |
2 |
3 |
9 |
4 |
3 |
2 |
A.1个 | B.2个 | C.3个 | D.4个 |
A.106元 | B.102元 | C.101.6元 | D.111.6元 |