计算或化简:(1)3(2)(3)()2(4)()(2)(5)(6)-八年级数学

题目简介

计算或化简:(1)3(2)(3)()2(4)()(2)(5)(6)-八年级数学

题目详情

计算或化简:
(1)3
(2)
(3)(2
(4)()(2
(5)
(6)
题型:计算题难度:中档来源:四川省月考题

答案

解:(1)3
=6﹣20
=﹣14
(2)
=3+2
=
(3)()2
=2+2+5
=7+2
(4)()(2
=(2)2﹣(3)2
=12﹣18
=﹣6;
(5)
=
=2﹣
=
(6)
=+1
=5+1
=6.

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