1.自然数:{4,0};
正整数:{4};
正分数:{0.01};
负整数:{-100};
负分数:{-3.5,-3,-2.15};
负有理数:{-3.5,-3、-100,-2.15}
2.输3局
3.,
4.6,-6
5.(1)×(2)×(3)√(4)×
6.相反数分别是:-3又5/8,2.35,0,22/7;
绝对值分别是:3又5/8,2.35,0,22/7
7.数轴略,-2<-<0<1.8<4又
8.(1)1
(2)5
9.太巴列湖高于死海
10.+3,-3
11.-1/3
12.(1)>(2)<(3)>(4)<
13.6
14.-2
15.数轴略
(1)∣-5∣+∣5/2∣=15/2
(2)-5,-4,-3,-2,-1,0,1,2
16.笫五个排球的质量最接近规定质量
17.点A,B,C表示的数分别是-3,3,-5或3,3,-1