1.	Simplify 1 Simplify the following expression: $$ \left(2 - 6\right)\left(5 + -1\right) + {\left(-1 + -6\right)}^{2} $$ Correct Answer $$ 33$$ or 33.0000

2.	Simplify 2 Simplify the following expression: $$ \frac{2\times1(-5)}{{\left(3\times1\right)}^{\left(5 - -2\right)}} $$ Correct Answer $$ \frac{-10}{2187}$$ or -0.00457247

3.	Fractions 1 Simplify the following expression: $$ \frac{-2}{2} + \frac{-3}{5} $$ Correct Answer $$ \frac{-8}{5}$$ or -1.6

4.	Fractions 2 Simplify the following expression: $$ \frac{\frac{3}{3}}{\frac{-5}{6}} $$ Correct Answer $$ \frac{-6}{5}$$ or -1.2

5.	Significant figures 1. Write the following to 2 significant figures: 1953.1934 Correct Answer 2000 or $$2.0\times10^{3}$$ 2. Write the following to 3 significant figures: 115.67057 Correct Answer 116 or $$1.16\times10^{2}$$

6.	Standard Form 1. Write the following in standard form to 4 significant digits: 107.765 Correct Answer $$1.078\times10^{2}$$ 2. Write the following in standard form to 2 significant digits: 90.3781 Correct Answer $$9.0\times10^{1}$$

7.	Significant figures 1. Write the following in preferred standard form to 4 significant digits: 438500 Correct Answer $$438.5\times10^{3}$$ 2. Write the following in preferred standard form to 5 significant digits: 5351.801 Correct Answer $$5.3518\times10^{3}$$

8.	Simplify 2 Simplify the following expression: $$ 2(-6)\left(2 + -3 - {(-2)}^{6}\right) $$ Correct Answer $$ 780$$ or 780.000

9.	Simplify 1 Simplify the following expression: $$ \left(4 - 1\right)\left(4 - -1\right) - 2\left(1 - 2\right) $$ Correct Answer $$ 17$$ or 17.0000

10.	Simplify 2 Simplify the following expression: $$ \left(6 + 4\right)\left(-5 - 3\right) + {\left(-6 - 1\right)}^{2} $$ Correct Answer $$ -31$$ or -31.0000