―1,4.5,0,2,―5,―3。
35、如果,那么a是( )(A)0 (B)0和1 (C)正数 (D)非负数
36、比较大小:|-3|____π,____,0.32____0.33,化简-[+(-5)]=______。
1.3有理数的加减法
37、= = = = = = = = = = = = = = = = = =
= = = =
-11.5+4.5 -+(-)+1 21-74-321+674 0.5+(-)-(-2.25