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歡迎您訪問數學考題練習:有理數a,b在數軸上的位置如圖所示,則!

數學考題練習:有理數a,b在數軸上的位置如圖所示,則

更新時間:2024-01-12 16:29:44作者:貝語網校

有理數a,b在數軸上的位置如圖所示,則

A.a+b>0

B.ab<0

C.b-a<0

D.a÷b>0

試題答案

B

試題解析

首先根據有理數a,b在數軸上的位置判斷出a、b兩數的符號,從而確定答案.

解答:由數軸可知:a<0<b,

所以ab<0

故選:B;

點評:本題考查了數軸及有理數的乘法,數軸上的數:右邊的數總是大于左邊的數,從而確定a,b的大小關系.

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