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加减混合运算(1)[(-3)-(+9)]-(-2)(2)(−23)−(+12)−(−56)−(+13)−(+112)(3)434-(+3.85)-(-334)+(-3.15)(4)|3-4|+(-5-8)-|-1+5|-(5-20)
题目详情
加减混合运算
(1)[(-3)-(+9)]-(-2)
(2)(−
)−(+
)−(−
)−(+
)−(+1
)
(3)4
-(+3.85)-(-3
)+(-3.15)
(4)|3-4|+(-5-8)-|-1+5|-(5-20)
(1)[(-3)-(+9)]-(-2)
(2)(−
2 |
3 |
1 |
2 |
5 |
6 |
1 |
3 |
1 |
2 |
(3)4
3 |
4 |
3 |
4 |
(4)|3-4|+(-5-8)-|-1+5|-(5-20)
▼优质解答
答案和解析
(1)[(-3)-(+9)]-(-2)
=(-3-9)+2
=-12+2
=-10;
(2)(-
)-(+
)-(-
)-(+
)-(+1
)
=-
-
+
-
-1
=-1+
-2
=-2
;
(3)4
-(+3.85)-(-3
)+(-3.15)
=4
+3
-3.85-3.15
=8.5-7
=1.5;
(4)|3-4|+(-5-8)-|-1+5|-(5-20)
=1-13-4+15
=16-17
=-1.
=(-3-9)+2
=-12+2
=-10;
(2)(-
2 |
3 |
1 |
2 |
5 |
6 |
1 |
3 |
1 |
2 |
=-
2 |
3 |
1 |
3 |
5 |
6 |
1 |
2 |
1 |
2 |
=-1+
5 |
6 |
=-2
1 |
6 |
(3)4
3 |
4 |
3 |
4 |
=4
3 |
4 |
3 |
4 |
=8.5-7
=1.5;
(4)|3-4|+(-5-8)-|-1+5|-(5-20)
=1-13-4+15
=16-17
=-1.
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