问题
解答题
计算题: (1)5+(-6)-(-2) (2)4-(-3)2×2 (3)
(4)(a2+2a)-2(
|
答案
(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.
计算题: (1)5+(-6)-(-2) (2)4-(-3)2×2 (3)
(4)(a2+2a)-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.