1.	Simplify 1 Simplify the following expression: $$ {\left(6 + -1\right)}^{2} - \left(-2 + 3\right)\left(-2 - -2\right) $$ Correct Answer $$ 25$$ or 25.0000

2.	Simplify 2 Simplify the following expression: $$ \frac{2\left(-3 - -3\right)}{\frac{-6}{-6} - \left(-1 + -3\right)} $$ Correct Answer $$ 0$$ or 0.0

3.	Fractions 1 Simplify the following expression: $$ \frac{-6}{2} + \frac{4}{5} $$ Correct Answer $$ \frac{-11}{5}$$ or -2.2

4.	Fractions 2 Simplify the following expression: $$ \frac{-1}{6}\frac{-3}{5} $$ Correct Answer $$ \frac{1}{10}$$ or 0.09999999999999999

5.	Significant figures 1. Write the following to 3 significant figures: 0.000044316066 Correct Answer 0.0000443 or $$4.43\times10^{-5}$$ 2. Write the following to 3 significant figures: 0.000025465662 Correct Answer 0.0000255 or $$2.55\times10^{-5}$$

6.	Standard Form 1. Write the following in standard form to 4 significant digits: 0.0000000298956 Correct Answer $$2.990\times10^{-8}$$ 2. Write the following in standard form to 2 significant digits: 1106980 Correct Answer $$1.1\times10^{6}$$

7.	Significant figures 1. Write the following in preferred standard form to 4 significant digits: 0.00000103202 Correct Answer $$1.032\times10^{-6}$$ 2. Write the following in preferred standard form to 5 significant digits: 0.121094 Correct Answer $$121.09\times10^{-3}$$

8.	Simplify 2 Simplify the following expression: $$ {\left(\frac{3}{-5}\right)}^{\left(5 + -1\right)} - {\left(-2 - 1\right)}^{2} $$ Correct Answer $$ {\left(\frac{3}{5}\right)}^{4} - 9$$ or -8.87040

9.	Simplify 1 Simplify the following expression: $$ -1 - 4 + 4 - 4 - 2\times1\times6 $$ Correct Answer $$ -17$$ or -17.0000

10.	Simplify 2 Simplify the following expression: $$ 2(-2)(-4)\left(\frac{2}{-5} + \frac{5}{4}\right) $$ Correct Answer $$ \frac{68}{5}$$ or 13.6000