Absolute Value Absolute Value is the distance a number is away from zero on the number line. Find.| 4 | 4 | – 4 | 4 * Absolute Value Is ALWAYS POSITIVE!!!!*

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Presentation transcript:

Absolute Value Absolute Value is the distance a number is away from zero on the number line. Find.| 4 | 4 | – 4 | 4 * Absolute Value Is ALWAYS POSITIVE!!!!*

Examples 1)– | 5 | – 5 2)– | – 3 | – 3 3)Evaluate 15 – | x + 4 | if x = – 8 15 – | – 8 + 4| 15 – | – 4 | 15 – 4 11

Operations With Rationals Evaluate. 1)- 6 + (-2)2) - 6 – (-2) )6 + (-2)4) 2 – (-6) 4 8 5)(-6)(-2)6) (-6) / (-2) )-6●28)6 / (-2)

Square Roots A square root is one of two equal factors of a number. Ex:8●8 = 64 so 8 is a square root of 64 -8●-8 = 64 so -8 is a square root of 64 The radical sign,, is used to indicate the POSITIVE square root of a number.

Practice Evaluate. 1) 2) 3) 4)