题目内容
计算题:
(1)5+(-6)-(-2)
(2)4-(-3)2×2
(3)
-2×
(精确到0.01)
(4)(a2+2a)-2(
a2+4a)
(1)5+(-6)-(-2)
(2)4-(-3)2×2
(3)
|
| 3 | -5 |
(4)(a2+2a)-2(
| 1 |
| 2 |
(1)原式=5-6+2=1;
(2)原式=4-9×2=4-18=-14;
(3)原式=0.816+3.420≈4.24;
(4)原式=a2+2a-a2-8a=-6a.
(2)原式=4-9×2=4-18=-14;
(3)原式=0.816+3.420≈4.24;
(4)原式=a2+2a-a2-8a=-6a.
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