2019年四川省眉山市中考数学试卷

$|-3|$

$-(-3)$

${(-3)}^2$

$-\sqrt{3}$

$1.2\times {10}^9$ 个

$12\times {10}^9$ 个

$1.2\times {10}^{10}$ 个

$1.2\times {10}^{11}$ 个

$2x^{2}y+3\mathit{xy}=5x^3{y}^2$

${(-2a{b}^2)}^3=-6a^3{b}^6$

${(3a+b)}^2=9a^2+b^2$

$(3a+b)(3a-b)=9a^2-b^2$

$50°$

$60°$

$70°$

$80°$

$x⩾-2$ 且 $x\ne 1$

$x⩾-2$

$x\ne 1$

$-2⩽x<1$

$a-b$

$a+b$

$\frac{1}{a-b}$

$\frac{1}{a+b}$

6

6.5

7

8

$(0,\frac{1}{2})$

$(0,\frac{4}{5})$

$(0,1)$

$(0,2)$

$6\sqrt{2}$

$3\sqrt{2}$

6

12

1

$\frac{7}{4}$

2

$\frac{12}{5}$

1个

2个

3个

4个