1.	Simplify 1 Simplify the following expression: $$ \left(4 - 1 + -1 - 4\right)2(-4)4 $$ Correct Answer $$ 64$$ or 64.0000

2.	Simplify 2 Simplify the following expression: $$ 2\times5\times5\left(-1 - 2 + \frac{4}{1}\right) $$ Correct Answer $$ 50$$ or 50.0000

3.	Fractions 1 Simplify the following expression: $$ \frac{-5}{2} + \frac{-5}{4} $$ Correct Answer $$ \frac{-15}{4}$$ or -3.75

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

5.	Significant figures 1. Write the following to 3 significant figures: 1702.4746 Correct Answer 1700 or $$1.70\times10^{3}$$ 2. Write the following to 4 significant figures: 166.60112 Correct Answer 166.6 or $$1.666\times10^{2}$$

6.	Standard Form 1. Write the following in standard form to 4 significant digits: 711.935 Correct Answer $$7.119\times10^{2}$$ 2. Write the following in standard form to 2 significant digits: 0.0000276580 Correct Answer $$2.8\times10^{-5}$$

7.	Significant figures 1. Write the following in preferred standard form to 3 significant digits: 0.03287 Correct Answer $$32.9\times10^{-3}$$ 2. Write the following in preferred standard form to 3 significant digits: 0.0007440 Correct Answer $$744\times10^{-6}$$

8.	Simplify 2 Simplify the following expression: $$ 2\frac{1}{6}\left(-1 - -2 + -2 - -4\right) $$ Correct Answer $$ 1$$ or 1.00000

9.	Simplify 1 Simplify the following expression: $$ \left(5 + -6 - 2\times3\right)2\times6\times5 $$ Correct Answer $$ -420$$ or -420.000

10.	Simplify 2 Simplify the following expression: $$ \left(-3 - 4 + 5 - 6\right)2\times6(-1) $$ Correct Answer $$ 96$$ or 96.0000