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歡迎您訪問數學考題練習：計算31986-5×31985+6×31984！

數學考題練習：計算31986-5×31985+6×31984

更新時間：2024-01-12 16:44:39作者：貝語網校

計算31986-5×31985+6×31984+1986的值為

A.1989

B.1986

C.1982

D.1987

試題答案

B

試題解析

通過觀察，可提取前三項的公因數31984，然后再計算即可．

解答：原式=31984（32-5×3+6）+1986=31984×0+1986=1986．

故選B．

點評：本題考查了有理數的乘方，解題的關鍵是靈活運用乘法分配律的逆運算．

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