Question

同號(hào)兩數(shù)相加，取________符號(hào)，并把絕對(duì)值________；絕對(duì)值相等的異號(hào)兩數(shù)相加，和為_(kāi)_______，絕對(duì)值不等的異號(hào)兩數(shù)相加時(shí)，取________的加數(shù)的符號(hào)，并用________的絕對(duì)值減去________的絕對(duì)值．

Answer 1

相同    相加    0    絕對(duì)值較大    較大    較小
分析：根據(jù)有理數(shù)加法法則：①同號(hào)相加，取相同符號(hào)，并把絕對(duì)值相加．②絕對(duì)值不等的異號(hào)加減，取絕對(duì)值較大的加數(shù)符號(hào)，并用較大的絕對(duì)值減去較小的絕對(duì)值．互為相反數(shù)的兩個(gè)數(shù)相加得0．③一個(gè)數(shù)同0相加，仍得這個(gè)數(shù)作答．
解答：同號(hào)兩數(shù)相加，取相同符號(hào)，并把絕對(duì)值相加；絕對(duì)值相等的異號(hào)兩數(shù)相加，和為0，絕對(duì)值不等的異號(hào)兩數(shù)相加時(shí)，取絕對(duì)值較大的加數(shù)的符號(hào)，并用較大的絕對(duì)值減去較小的絕對(duì)值．
故答案為：相同，相加，0，絕對(duì)值較大，較大，較�。�
點(diǎn)評(píng)：考查了有理數(shù)的加法法則，關(guān)鍵是熟記法則并且靈活運(yùn)用．