题目内容
计算
(1)-2+(-4)-(-2);
(2)(-2
)×1
+(-2
)(-1
)+1;
(3)(-
)÷
×(-
);
(4)-32+(-2)+(-3)2.
(1)-2+(-4)-(-2);
(2)(-2
23 |
172 |
1 |
2 |
23 |
172 |
1 |
2 |
(3)(-
2 |
3 |
4 |
3 |
3 |
4 |
(4)-32+(-2)+(-3)2.
(1)原式=-2-4+2
=-6+2
=-4;
(2)原式=0+1
=1;
(3)原式=
×
×
=
;
(4)原式=-9-2+9
=-9+9-2
=-2.
=-6+2
=-4;
(2)原式=0+1
=1;
(3)原式=
2 |
3 |
3 |
4 |
3 |
4 |
=
3 |
8 |
(4)原式=-9-2+9
=-9+9-2
=-2.
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