Math Rules
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| LCD | least common denominator
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| GCF | greatest common factor
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| What is LCD of two or more fractions? | The smallest number that can be divided equally by each of the fractions denominators.
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| How to determine the GCF? | The number that goes into both numbers evenly.
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| How to find the LCD? | Multiply the denominators together and divide by the GCF.
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| Find LCD of 2/9 + 3/12? | Multiply denominators (9x12)=108 then, divide by LCD which is 3 (108 divided by 3)=36
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| What is a Proper Fraction? | A fraction with the numerator smaller than the denominator.
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| What does Simplify a fractions means? | To use all common factors to bring fraction to lowest terms. Example: 16/24 (4 is Common factor) ANSWER: 16/24 = 8/12 = 4/6 = 2/3
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| How to convert % to fraction? | Make a fraction with % as numerator and 100 as denominator. Simplify/reduce fraction if possible.
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| A Percent converted to a fraction | 7% = 7/100
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| How to convert decimals to percents? | Multiply decimal by 100 or move decimal 2 places to right and add % sign to answer.
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| A decimal converted to percent | 0.39 = 0.39x100=39%
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| How to convert percent to decimal? | Divide % by 100. Round answer if needed.
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| A percent converted to decimal | 83% = 83 divided by 100 = 0.83
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| How to find the percent of a number? | Divide first number by second number. Multiply answer by 100 or simply move decimal 2 places to right. Round answer and follow with a % sign.
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| 68 is what % of 87 | 78%
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| 75% of 24 km? | 18
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| What is sale price of a $20.00 item discounted by 25%? | $15.00
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Created by:
karen.evans83@yahoo.
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