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歡迎您訪問數(shù)學(xué)考題練習(xí):有理數(shù)a、b、c在數(shù)軸上的位置如圖所示,則a-!

數(shù)學(xué)考題練習(xí):有理數(shù)a、b、c在數(shù)軸上的位置如圖所示,則a-

更新時間:2024-01-12 14:09:00作者:貝語網(wǎng)校

有理數(shù)a、b、c在數(shù)軸上的位置如圖所示,則a-b+c等于

A.-4

B.-1

C.2

D.-5

試題答案

C

試題解析

先根據(jù)數(shù)軸,求出a、b、c的值,再代入a-b+c中計算即可.

解答:根據(jù)數(shù)軸得

a=-,b=-3,c=,

∴a-b+c=--(-3)+=2.

故選C.

點評:此題考查了數(shù)軸的內(nèi)容、有理數(shù)的加減混合運算,體現(xiàn)了數(shù)形結(jié)合的優(yōu)點.

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