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歡迎您訪問數學考題練習:計算(1)   (2).!

數學考題練習:計算(1)   (2).

更新時間:2024-01-12 16:37:57作者:貝語網校

計算

(1) (2).

試題答案

解:(1),

=4-+8,

=+8;

(2),

=8-6++3-+3,

=14-6.

試題解析

(1)先把各二次根式化為最簡二次根式,再進行計算;

(2)首先計算求得(-3)2的值,再去括號計算即可.

點評:本題考查的是二次根式的混合運算,在進行此類運算時一般先把二次根式化為最簡二次根式的形式后再運算.

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