1.	Simplify 1 Simplify the following expression: $$ \left(-1 - 4\right)\left(-1 + 2\right) - 2\times3\times5 $$ Correct Answer $$ -35$$ or -35.0000

2.	Simplify 2 Simplify the following expression: $$ \frac{{\left(5 + -5\right)}^{2}}{3 + 2 - \frac{5}{-3}} $$ Correct Answer $$ 0$$ or 0.0

3.	Fractions 1 Simplify the following expression: $$ \frac{5}{3} - \frac{-2}{5} $$ Correct Answer $$ \frac{31}{15}$$ or 2.066666666666667

4.	Fractions 2 Simplify the following expression: $$ \frac{\frac{-2}{6}}{\frac{-5}{4}} $$ Correct Answer $$ \frac{4}{15}$$ or 0.26666666666666666

5.	Significant figures 1. Write the following to 2 significant figures: 0.045426497 Correct Answer 0.045 or $$4.5\times10^{-2}$$ 2. Write the following to 2 significant figures: 0.000032575159 Correct Answer 0.000033 or $$3.3\times10^{-5}$$

6.	Standard Form 1. Write the following in standard form to 3 significant digits: 4771.29 Correct Answer $$4.77\times10^{3}$$ 2. Write the following in standard form to 3 significant digits: 0.0000679999 Correct Answer $$6.80\times10^{-5}$$

7.	Significant figures 1. Write the following in preferred standard form to 5 significant digits: 60201.12 Correct Answer $$60.201\times10^{3}$$ 2. Write the following in preferred standard form to 4 significant digits: 5163.6 Correct Answer $$5.164\times10^{3}$$

8.	Simplify 2 Simplify the following expression: $$ \left(4 + -6\right)\left(2 + 4\right) - 2(-4)(-4) $$ Correct Answer $$ -44$$ or -44.0000

9.	Simplify 1 Simplify the following expression: $$ 2\times1(-4)\left(-5\times1 - \left(4 + 1\right)\right) $$ Correct Answer $$ 80$$ or 80.0000

10.	Simplify 2 Simplify the following expression: $$ \frac{2 + 1}{5 - -1}2\times1\times1 $$ Correct Answer $$ 1$$ or 1.00000