7实数与二次根式的混合运算-计算题86道-3
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实数的运算练习一
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实数的运算练习二
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实数的运算练习三
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二次根式的混合运算
一.解答题(共30小题)
1.计算:(1)|﹣1|+(﹣2)2+(7﹣π)0﹣()﹣1 (2)÷﹣×+.
2.(1)计算:( ﹣2)0﹣|+|×(﹣);(2)化简:(1+)+(2x﹣)
3.化简:(1);(2)(x+y)2﹣(x﹣y)2.
4.(1)计算:(2).
5.化简或解方程组:
(1)(2).
6.(1)计算;(2)分解因式(x+2)(x+4)+x2﹣4.
7.化简:(1);(2).