Weekly Summary

1- Please evaluate and explain your answer using a number line: (-2) + (-5)

Did you change direction or go in the same direction?

Was your answer on the positive (“+”) or negative (“-“) side of 0? (please see section 1.1 for further review)
2- Please evaluate and explain your answer using a number line: (-6) + (+2)

Did you change direction or go in the same direction?

Simplify by removing unnecessary symbols: _ _ _ _ = _ _ (please see section 1-2 for further review)

3- Evaluate: (-2)3 + (-5 + 8) I 3 – 15 (Please see section 1-4 an 1-5)

4- If you are adding 2 numbers with different signs (direction), how would you find out the sign and number of the answer?
Please evaluate and explain: 2 – 5 (please see section 1.1 for further review)

5- Remove grouping symbols and combine like terms: 5(2c -d) – (5c + 6d) (please see section 1-9 for review)
6- Add: 8 + H“ – (-1) + (-5) (please see sections 1.1 and 1-2 and for further review)

7- Simplify: 4(2x – 5) (please see sections 1-6 for further review)

When multiplying or dividing signed numbers, count the number of negative signs:

Even number of negative signs = + (positive)

Odd number of negative signs = – (negative)

8- Evaluate: (-8)(-5) (please see section 1-3 for further review)

9- Evaluate: (-1)(+3)(-2)(-4) (please see section 1-3 for further review)

-32 = -1*32 = -1 * 9 = -9 (order of operations) while (-3)2 = (-3)(-3) = +9 or 9

10- Evaluate: Z2 – X2 -XY if X = -2, Y = 3, and Z = -4 (please see section 1-8 for further review)

 

 

 

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