题目内容
【题目】计算:
(1)(-4)+6=___________________=________;
(2)(-12)+(+3)=___________________=________;
(3)(-3)+(-9)=___________________=________;
【答案】6-4; 2; -(12-3); -9; -(3+9); -12;
【解析】
依据有理数的加法法则进行计算即可.
(1)(-4)+6=6-4=2;
(2)(-12)+(+3)=-(12-3)=-9;
(3)(-3)+(-9)=-(3+9)=-12;
故答案为:6-4;2;-(12-3);-9; -(3+9); -12.
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