1. 填空:
(1)$9-10=\_\_\_\_\_\_$;
(2)$0-(-3)=\_\_\_\_\_\_$;
(3)$-12-13=\_\_\_\_\_\_$;
(4)$-5.3-(-2.2)=\_\_\_\_\_\_$.
(1)$9-10=\_\_\_\_\_\_$;
(2)$0-(-3)=\_\_\_\_\_\_$;
(3)$-12-13=\_\_\_\_\_\_$;
(4)$-5.3-(-2.2)=\_\_\_\_\_\_$.
答案
1.(1)-1 (2)3 (3)-25 (4)-3.1
2. 计算:
(1)$(-2)-(-5\dfrac{1}{2})$;
(2)$-13-|-7|$;
(3)$-|-3|-(-3)$;
(4)$11-(-9)-(+3)$;
(5)$3-(+11.1)-(-9.9)$;
(6)$\dfrac{1}{2}-(\dfrac{1}{4}-\dfrac{1}{6})$;
(7)$3-[(-6)-(+9)]$;
(8)$(3-5)-(6-10)$;
(9)$|-13|+(-5)-(-21)-19$;
(10)$-\dfrac{1}{2}-[\dfrac{1}{3}-(\dfrac{1}{4}-\dfrac{1}{6})]$.
(1)$(-2)-(-5\dfrac{1}{2})$;
(2)$-13-|-7|$;
(3)$-|-3|-(-3)$;
(4)$11-(-9)-(+3)$;
(5)$3-(+11.1)-(-9.9)$;
(6)$\dfrac{1}{2}-(\dfrac{1}{4}-\dfrac{1}{6})$;
(7)$3-[(-6)-(+9)]$;
(8)$(3-5)-(6-10)$;
(9)$|-13|+(-5)-(-21)-19$;
(10)$-\dfrac{1}{2}-[\dfrac{1}{3}-(\dfrac{1}{4}-\dfrac{1}{6})]$.
答案
2.(1)$3\dfrac{1}{2}$ (2)-20 (3)0 (4)17 (5)1.8
(6)$\dfrac{5}{12}$ (7)18 (8)2 (9)10 (10)$-\dfrac{3}{4}$
(6)$\dfrac{5}{12}$ (7)18 (8)2 (9)10 (10)$-\dfrac{3}{4}$
登录