题目内容
计算题:
(1)-4.27+3.8-0.73+1.2
(2)2-22×2-3×(-1)2013
(3)25×
-(-25)×
+25×(-
)
(4)-24-
×[5-(-3)2].
(1)-4.27+3.8-0.73+1.2
(2)2-22×2-3×(-1)2013
(3)25×
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
(4)-24-
| 1 |
| 2 |
(1)原式=(-4.27-0.73)+(3.8+1.2)
=-5+5
=0;
(2)原式=2-4×2-3×(-1)
=2-8+3
=-3;
(3)原式=25×(
+
-
)
=25×0
=0;
(4)原式=-16-
×(5-9)
=-16-
×(-4)
=-16+2
=-14.
=-5+5
=0;
(2)原式=2-4×2-3×(-1)
=2-8+3
=-3;
(3)原式=25×(
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
=25×0
=0;
(4)原式=-16-
| 1 |
| 2 |
=-16-
| 1 |
| 2 |
=-16+2
=-14.
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