Absolute Value | Math Placement Test Prep | ALEKS | TSI | ACCUPLACER | PERT

Uploaded January 2016 | Updated September 2026, 2 weeks ago

Prep for your math placement test at MathHelp.com:
mathhelp.com

This lesson covers absolute value. Students learn that the absolute value of a number is its distance from zero on a number line. For example, the absolute value of --8 is +8, because --8 is 8 units from zero on the number line. Note that the absolute value of any positive or negative integer is positive. Students also learn that the first step to simplifying absolute value problems is to simplify inside the absolute value, if possible.

Absolute Value | Math Placement Test Prep | ALEKS | TSI | ACCUPLACER | PERT | MathHelp.com

Experimental Probability | Math Placement Test Prep | ALEKS | TSI | ACCUPLACER | PERT | MathHelp.com

$Comparing Fractions | Math Placement Test Prep | ALEKS | TSI | ACCUPLACER | PERT | MathHelp.com Prep for your math placement test at MathHelp.com: https://www.mathhelp.com This lesson covers comparing fractions. Students learn to compare fractions with the same denominator, which are called like fractions, by comparing the numerators. For example, to compare 7/9 and 4/9, note that 7 is greater than 4, so 7/9 is greater than 4/9. Students also learn to compare fractions with the different denominators, which are called unlike fractions, by first finding a common denominator, then comparing the numerators. For example, to compare 1/2 and 1/3, first find a common denominator, or the Least Common Multiple of 2 and 3, which is 6. To get 6 in the denominator of 1/2, multiply the numerator and denominator by 3, to get 3/6. To get 6 in the denominator of 1/3, multiply the numerator and denominator by 2, to get 2/6. Next, compare 3/6 and 2/6. Note that 3 is greater than 2, so 3/6 is greater than 2/6, which means that 1/2 is greater than 1/3.$

Product Rule | Adding Exponents | MathHelp.com

Commutative Property of Multiplication | MathHelp.com

$Lowest Common Denominator | Math Placement Test | ALEKS | TSI | ACCUPLACER | PERT | MathHelp.com Prep for your math placement test at MathHelp.com: https://www.mathhelp.com This lesson covers subtracting fractions using the lowest common denominator. Students learn to subtract unlike fractions by first finding a common denominator. For example, to subtract 7/12 - 1/3, first find the common denominator of 12 and 3, or the Least Common Multiple of 12 and 3, which is 12. Then multiply the numerator and denominator of 1/3 by 4, to get the equivalent fraction 4/12. Next, subtract the like fractions, 7/12 + 4/12, to get 3/12. Finally, reduce 3/12 to 1/4.$

Solving Natural Logarithms | MathHelp.com

Volume of a Cone | Math Placement Test Prep | MathHelp.com