1.	Simplify 1 Simplify the following expression: $$ \left(6 - 3 + 2 - -5\right)2(-(-1)) $$ Correct Answer $$ 20$$ or 20.0000

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

3.	Fractions 1 Simplify the following expression: $$ \frac{-4}{4} - \frac{-2}{3} $$ Correct Answer $$ \frac{-1}{3}$$ or -0.33333333333333337

4.	Fractions 2 Simplify the following expression: $$ \frac{-3}{5}\frac{-3}{6} $$ Correct Answer $$ \frac{3}{10}$$ or 0.3

5.	Significant figures 1. Write the following to 2 significant figures: 2.1994112 Correct Answer 2.2 or $$2.2\times10^{0}$$ 2. Write the following to 4 significant figures: 0.000075685826 Correct Answer 0.00007569 or $$7.569\times10^{-5}$$

6.	Standard Form 1. Write the following in standard form to 3 significant digits: 0.00104144 Correct Answer $$1.04\times10^{-3}$$ 2. Write the following in standard form to 2 significant digits: 1.93529 Correct Answer $$1.9\times10^{0}$$

7.	Significant figures 1. Write the following in preferred standard form to 4 significant digits: 14260.9 Correct Answer $$14.26\times10^{3}$$ 2. Write the following in preferred standard form to 4 significant digits: 0.000495589 Correct Answer $$495.6\times10^{-6}$$

8.	Simplify 2 Simplify the following expression: $$ \frac{2(-3)(-2)}{{\left(-5 - 2\right)}^{\left(6 + 2\right)}} $$ Correct Answer $$ \frac{12}{{7}^{8}}$$ or 0.00000208160

9.	Simplify 1 Simplify the following expression: $$ 4(-1) - \left(2 + 6\right) + {\left(-6 + 1\right)}^{2} $$ Correct Answer $$ 13$$ or 13.0000

10.	Simplify 2 Simplify the following expression: $$ {\left(\frac{1}{3}\right)}^{2} + \left(4 - 4\right)\frac{-1}{-5} $$ Correct Answer $$ {\left(\frac{1}{3}\right)}^{2}$$ or 0.111111