来自李洪周的问题
正负数加减法的习题
正负数加减法的习题


正负数加减法的习题
正负数加减法的习题
(1)23+(-73)(2)(-84)+(-49)(3)7+(-2.04)(4)4.23+(-7.57)(5)(-7/3)+(-7/6)(6)9/4+(-3/2)(7)3.75+(2.25)+5/4(8)-3.75+(+5/4)+(-1.5)
1)(-17/4)+(-10/3)+(+13/3)+(11/3)(2)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)
(1)(-7)-(+5)+(+3)-(-9)=-7539;
(2)-(+2)-(-1)-(+3)+(-)
=(2)+(1)+(3)+();
(3)-145(-3)=-12;
(4)-12(-7)(-5)(-6)=-16;
(5)b-a-(+c)+(-d)=abcd;