Week 3 – Math 11

This week in math 11 we learned about the Absolute Value of a Real Number and the use of absolute value bars. Absolute value bars are 2 vertices lines “| |” that go on either side and indicate that you will need to find the absolute value of the number inside. These bars can get commonly confused with brackets “()” because they are very similar. The absolute value = distance a number is from zero and this distance will always be positive, the absolute value of a real number is defined as the principal square root of the square of a number. One thing to remember is that the absolute value bars do not mean multiplication and numbers on the outside cannot be distributed in.

Ex. |15| = 15, |-7.6| = 7.6

|5(4)-3|

|20-3|

=17

|5-4|(5+4) – 2(5+4)

|1|(9) – 2(9)

= -9

(there is no absolute value bars so answer is allowed to be negative but the 1 in the equation has to be positive because it is in the bars)

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