Question

因?yàn)榈近c(diǎn)2和點(diǎn)6距離相等的點(diǎn)表示的數(shù)是4，有這樣的關(guān)系，那么到點(diǎn)100和到點(diǎn)999距離相等的數(shù)是________；到點(diǎn)距離相等的點(diǎn)表示的數(shù)是________；到點(diǎn)m和點(diǎn)-n距離相等的點(diǎn)表示的數(shù)是________．

Answer 1

        
分析：根據(jù)數(shù)軸上到兩點(diǎn)間的距離相等的點(diǎn)所對(duì)應(yīng)的數(shù)是表示這兩個(gè)點(diǎn)所對(duì)應(yīng)的數(shù)的平均數(shù)．
解答：根據(jù)題意可知：到點(diǎn)100和到點(diǎn)999距離相等的點(diǎn)表示的數(shù)是；到點(diǎn)距離相等的點(diǎn)表示的數(shù)是-；到點(diǎn)m和點(diǎn)-n距離相等的點(diǎn)表示的數(shù)是．
故答案為：，-，．
點(diǎn)評(píng)：本題考查了數(shù)軸的知識(shí)，注意表示數(shù)軸上到兩點(diǎn)間的距離相等的點(diǎn)所對(duì)應(yīng)的數(shù)的公式：等于兩點(diǎn)所對(duì)應(yīng)的數(shù)的平均數(shù)．