A-A+
计算:(1)(-9)-(10)-(2)-(-8)(2)(-8.4)+112+(-25)+(-
问题详情
计算:
(1)(-9)-(10)-(2)-(-8)
(2)(-8.4)+1
(3)(-5.3)+(-3.2)-(-2.5)-(4.8)
(4)12+(-3)-(15)-(-4)
(5)-
(6)(
参考答案
(1)原式=-9-10-2+8=-21+8=-13;
(2)原式=-8.4+1.5-0.3+2.2=-8.7+3.5=-5.2;
(3)原式=-5.3-3.2+2.5-4.8=-13.3+2.5=-10.8;
(4)原式=12-3-15+4=-2;
(5)原式=-76+14=-1112;
(6)原式=(713-713)+(17+7)+(213-113)=0+24+1=25.
考点: