Estimating Quotients | Math Placement Test Prep | ALEKS | TSI | ACCUPLACER | PERT | MathHelp.com @yourteachermathhelp

Uploaded January 2016 | Updated September 2026, 2 weeks ago

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This lesson covers estimating quotients. Students learn to estimate a product or quotient by first rounding each number to one non-zero digit. For example, to estimate 8,291 x 27, first round 8,291 down to 8,000, and round 27 up to 30, then multiply 8,000 x 30 to get 240,000.

Estimating Quotients | Math Placement Test Prep | ALEKS | TSI | ACCUPLACER | PERT | MathHelp.com

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

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

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Estimating Quotients | Math Placement Test Prep | ALEKS | TSI | ACCUPLACER | PERT | MathHelp.com