题目内容
计算下列各题:
(1)3×(-2)-(-1)÷
×(-3)
(2)-7×(-
)+26×(-
)+2×
(3)-13-(1-0.5)×
×[2-(-3)2]
(4)(-2)2-(3-5)-
+2×(-3).
(1)3×(-2)-(-1)÷
| 1 |
| 3 |
(2)-7×(-
| 22 |
| 7 |
| 22 |
| 7 |
| 22 |
| 7 |
(3)-13-(1-0.5)×
| 1 |
| 3 |
(4)(-2)2-(3-5)-
| 4 |
(1)原式=-6+1×3×(-3)
=-6-9
=-15;
(2)原式=-
×(-7+26-2)
=-
×(-21)
=-66;
(3)原式=-1-
×
×(2-9)
=-1+
=
;
(4)原式=4-(-2)-2-6
=-2.
=-6-9
=-15;
(2)原式=-
| 22 |
| 7 |
=-
| 22 |
| 7 |
=-66;
(3)原式=-1-
| 1 |
| 2 |
| 1 |
| 3 |
=-1+
| 7 |
| 6 |
=
| 1 |
| 6 |
(4)原式=4-(-2)-2-6
=-2.
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