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歡迎您訪問數學考題練習:計算:(-5)×(-7)+5×(-6)!

數學考題練習:計算:(-5)×(-7)+5×(-6)

更新時間:2024-01-12 14:02:45作者:貝語網校

計算:(-5)×(-7)+5×(-6)

試題答案

解:原式=35-30,

=5.

試題解析

首先根據有理數的乘法法則:兩數相乘,同號得正,異號得負,并把絕對值相乘計算乘法,再計算有理數的減法即可.

點評:此題主要考查了有理數的乘法運算,關鍵是熟練掌握有理數的乘法法則,正確判定結果的符號.

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