1.	Simplify 1 Simplify the following expression: $$ \left(-6(-3) + 3 - 6\right)2(-5)(-3) $$ Correct Answer $$ 450$$ or 450.000

2.	Simplify 2 Simplify the following expression: $$ 2\times4(-1)\left(5 + 4 - \left(4 + 4\right)\right) $$ Correct Answer $$ -8$$ or -8.00000

3.	Fractions 1 Simplify the following expression: $$ \frac{6}{6} + \frac{-2}{3} $$ Correct Answer $$ \frac{1}{3}$$ or 0.33333333333333337

4.	Fractions 2 Simplify the following expression: $$ \frac{\frac{6}{5}}{\frac{-4}{6}} $$ Correct Answer $$ \frac{-9}{5}$$ or -1.8

5.	Significant figures 1. Write the following to 3 significant figures: 0.98211539 Correct Answer 0.982 or $$9.82\times10^{-1}$$ 2. Write the following to 5 significant figures: 0.11488762 Correct Answer 0.11489 or $$1.1489\times10^{-1}$$

6.	Standard Form 1. Write the following in standard form to 5 significant digits: 0.0105471 Correct Answer $$1.0547\times10^{-2}$$ 2. Write the following in standard form to 2 significant digits: 71.8278 Correct Answer $$7.2\times10^{1}$$

7.	Significant figures 1. Write the following in preferred standard form to 2 significant digits: 0.00445 Correct Answer $$4.5\times10^{-3}$$ 2. Write the following in preferred standard form to 5 significant digits: 1681.020 Correct Answer $$1.6810\times10^{3}$$

8.	Simplify 2 Simplify the following expression: $$ \frac{4 + 1}{-6 - 4} + {\left(\frac{2}{-3}\right)}^{2} $$ Correct Answer $$ \frac{-1}{18}$$ or -0.0555556

9.	Simplify 1 Simplify the following expression: $$ \left(1 - -4\right)\left(2 - 6\right) + {\left(5 - 1\right)}^{2} $$ Correct Answer $$ -4$$ or -4.00000

10.	Simplify 2 Simplify the following expression: $$ \frac{2(-6)6}{\frac{1}{-3} - \frac{-4}{-6}} $$ Correct Answer $$ 72$$ or 72.0000