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计算:(1)(-10)+8(2)(-0.25)×135(3)(-8)+10+2-1(4)(-337)-(-1.25)+(-1647)-(+2.5)
题目详情
计算:
(1)(-10)+8
(2)(-0.25)×1
(3)(-8)+10+2-1
(4)(-3
)-(-1.25)+(-16
)-(+2.5)
(1)(-10)+8
(2)(-0.25)×1
3 |
5 |
(3)(-8)+10+2-1
(4)(-3
3 |
7 |
4 |
7 |
▼优质解答
答案和解析
(1)(-10)+8=-2;
(2)(-0.25)×1
=-
;
(3)(-8)+10+2-1
=(-8-1)+(10+2)
=-9+12
=3;
(4)(-3
)-(-1.25)+(-16
)-(+2.5)
=(-3
-16
)+(1.25-2.5)
=-20-1.25
=-21.25.
(2)(-0.25)×1
3 |
5 |
2 |
5 |
(3)(-8)+10+2-1
=(-8-1)+(10+2)
=-9+12
=3;
(4)(-3
3 |
7 |
4 |
7 |
=(-3
3 |
7 |
4 |
7 |
=-20-1.25
=-21.25.
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