题目内容
计算:
(1)(-2
)+(+
)+(-0.5)+(+1
)
(2)(-6)÷2×(-
);
(3)-62-(3-7)2-2×(-1)3-|-2|
(4)(
-
-
)×(-8)
(1)(-2
1 |
2 |
5 |
6 |
1 |
6 |
(2)(-6)÷2×(-
1 |
3 |
(3)-62-(3-7)2-2×(-1)3-|-2|
(4)(
1 |
2 |
3 |
4 |
7 |
8 |
(1)(-2
)+(+
)+(-0.5)+(+1
)
=(-2
-0.5)+(
+1
)
=-3+2
=-1;
(2)(-6)÷2×(-
)
=(-3)×(-
)
=1;
(3)-62-(3-7)2-2×(-1)3-|-2|
=-36-(-4)2-2×(-1)-2
=-36-16+2-2
=-52;
(4)(
-
-
)×(-8)
=-
×8+
×8+
×8
=-4+6+7
=9.
1 |
2 |
5 |
6 |
1 |
6 |
=(-2
1 |
2 |
5 |
6 |
1 |
6 |
=-3+2
=-1;
(2)(-6)÷2×(-
1 |
3 |
=(-3)×(-
1 |
3 |
=1;
(3)-62-(3-7)2-2×(-1)3-|-2|
=-36-(-4)2-2×(-1)-2
=-36-16+2-2
=-52;
(4)(
1 |
2 |
3 |
4 |
7 |
8 |
=-
1 |
2 |
3 |
4 |
7 |
8 |
=-4+6+7
=9.
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