(1)有理数加法运算律
(i)加法交换律:a+b=b+a.
(ii)加法结合律:(a+b)+c=a+(b+c).
(2)有理数乘法运算律
(i)乘法交换律:ab=ba.
(ii)乘法结合律:(ab)c=a(bc).
(iii)乘法分配律:a(b+c)=ab+ac.
故答案为:(1)(i)a+b=b+a;(ii)(a+b)+c=a+(b+c);(2)(i)ab=ba;(ii)(ab)c=a(bc);(iii)a(b+c)=ab+ac
(1)有理数加法运算律
(i)加法交换律:a+b=b+a.
(ii)加法结合律:(a+b)+c=a+(b+c).
(2)有理数乘法运算律
(i)乘法交换律:ab=ba.
(ii)乘法结合律:(ab)c=a(bc).
(iii)乘法分配律:a(b+c)=ab+ac.
故答案为:(1)(i)a+b=b+a;(ii)(a+b)+c=a+(b+c);(2)(i)ab=ba;(ii)(ab)c=a(bc);(iii)a(b+c)=ab+ac