题目
题型:解答题难度:一般来源:不详
(1)5-(-6)-(+3)
(2)(-81)÷2
1 |
4 |
4 |
9 |
(3)(
7 |
9 |
5 |
6 |
3 |
4 |
1 |
36 |
(4)-42÷(-2)-(-
1 |
8 |
1 |
4 |
(5)1-2+3-4+5-6+…+2019-2020.
答案
=5+6-3
=11-3
=8;
(2)(-81)÷2
1 |
4 |
4 |
9 |
=(-81)×
4 |
9 |
4 |
9 |
1 |
8 |
=2;
(3)(
7 |
9 |
5 |
6 |
3 |
4 |
1 |
36 |
=(
7 |
9 |
5 |
6 |
3 |
4 |
=
7 |
9 |
5 |
6 |
3 |
4 |
=(-28)-(-30)+(-27)
=(-56)+30
=-26;
(4)-42÷(-2)-(-
1 |
8 |
1 |
4 |
=-16÷(-2)-(-
1 |
8 |
=8-(-2)
=8+2
=10;
(5)1-2+3-4+5-6+…+2019-2020
=(1-2)+(3-4)+(5-6)+…+
=(-1)+(-1)+…+(-1)(1010个-1相加)
=-1010.
核心考点
试题【计算下列各小题(1)5-(-6)-(+3)(2)(-81)÷214×49÷(-8)(3)(79-56+34)÷(-136)(4)-42÷(-2)-(-18)÷(】;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
11 |
14 |
4 |
17 |
2 |
15 |
4 |
17 |
13 |
15 |
13 |
15 |
3 |
4 |
7 |
3 |
7 |
12 |
1 |
7 |