Many 5th grade math word problems involve adding fractions or subtracting fractions or multiplying and dividing fractions. First step in the addition and subtraction of fractions is to convert mixed fractions into improper fractions. Then the problem reduces to adding or subtracting fractions with unlike denominators. Find the Lowest common denominator (LCD) of all the denominators and multiply and divide each fraction by LCD and reduce each of them to their equivalent fractions with LCD as the denominator. Since the denominators are same, add or subtract the numerators to get the result. For multiplying fractions, multiply the numerators and multiply the denominators. For dividing fractions, reverse the second fraction and then multiply it with the first fraction. Practice many word problems with fractions from free fraction worksheets here and use other resources on this page to improve your skills.
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You simply add the numerators. Example: If the fractions have different denominators, determine the lowest common denominator (LCD) so that you can express each fraction in equivalent form. The lowest common denominator is the lowest number that the denominator of each individual fraction will divide into.
Change 3 1/3 to 10/3 by multiplying 3×3=9 then 9+1=10, hence 10/3. Now solve 10/3 – 12/5 like any other fraction. The least common multiple of 3 and 5 is 15. Therefore our new fractions are 50/15 – 36/15, sice the denominator is the same we do 50 – 36= 14.
First step: Write the whole number and the mixed number as improper fractions. Second step: Write the reciprocal of the divisor, 2/5, and multiply. Third step: Simplify, if possible. Notice that we can simplify our problem at this step, to make our calculations easier.
To subtract decimal numbers:**Put the numbers in a vertical column aligning the decimal points.**Subtract each column, starting on the right and working left. … **Place the decimal point in the answer directly below the decimal points in the terms.**Check the answer by adding.
