1、直接写出计算结果:\(100 \times {10^{ – 2}} = \) ;\({a^3} \cdot {\left( { – 2a{b^2}} \right)^3} = \) .
2、计算:\(a\left( {1 – a} \right) + {\left( {a + 1} \right)^2} – 1 = \) .
3、若\(m = 2n – 5\),则\({m^2} – 4mn + 4{n^2}\)的值是 .
4、已知代数式\(\left( {a – 1} \right)\left( {a + 2} \right) – {\left( {a – 1} \right)^2}\)的值是负数,则\(a\)的取值范围是 .
5、如图,在\(Rt\Delta ABC\)中,\(\angle C = 90^\circ \)沿图中虚线剪去\(\angle C\),则\(\angle 1 + \angle 2 = \) \(^\circ \).
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