how do u add and subtract fractions with different denominators?
21544
['Find the smallest multiple (LCM) of both numbers.', 'Rewrite the fractions as equivalent fractions with the LCM as the denominator.']
73648
['You must have a common denominator.', 'To find the Least Common Denominator (LCD), take the least common multiple of the individual denominators.', 'Express each fraction as a new fraction with the common denominator, ... ', 'To add fractions with the same denominator:']
39071
['Find a common denominator by multiplying the two denominators together.', 'Manipulate the fractions so that they both have the common denominator.', 'Once you have a common denominator in both fractions, subtract the numerators.']
338172
Since you're trying to subtract a larger fraction from a smaller one, you need to "borrow" a one from the integer 4, change it to 15/15, and add it to the fraction. Now the problem becomes 3 20/15 minus 3 9/15 and the answer is 11/15.
1392795
['Things to remember:', 'Step 1: Find a common multiple of the denominators.', 'HINT: The easiest way to do this is multiply the denominators together.', 'Step 2: Multiply the fractions so that the denominators the same.']
557933
['Subtract 1 from the whole number part of the mixed number being subtracted.', 'Add that 1 to the fraction part to make an improper fraction. For example, .', 'Then, subtract as with any other mixed numbers.']
741490
You can add a whole number and a proper fraction by simply combining the two elements. To add a whole number and an improper fraction, you must convert the whole number to an improper fraction, find a common denominator, then add the fractions.
1155323
To add fractions there are Three Simple Steps: Step 1: Make sure the bottom numbers (the denominators) are the same. Step 2: Add the top numbers (the numerators), put that answer over the denominator. Step 3: Simplify the fraction (if needed)
1159878
['Step 1: Find the least common denominator. Find the least common denominator (LCD) of the fractions. ... ', 'Step 2: Find the equivalent fraction. Find the equivalent fraction of each fraction so that they all have the LCD as the denominator.', 'Step 3: Subtract the new numerators. ... ', 'Step 4: Simplify if necessary.']
619153
Step 1 Find the least common denominator of the two fractions. Step 2 Change each fraction to an equivalent fraction having the least common denominator. Step 3 Find the difference of the numerators and place this result over the least common denominator. Step 4 Simplify (or reduce) the fraction obtained in step 3.
212326
['Cross-multiply the two fractions and add the results together to get the numerator of the answer. Suppose you want to add the fractions 1/3 and 2/5. ... ', 'Multiply the two denominators together to get the denominator of the answer. ... ', 'Write your answer as a fraction.']
748908
You can add and subtract like fractions easily - simply add or subtract the numerators and write the sum over the common denominator. ... Rewrite the fractions as equivalent fractions with the LCM as the denominator.
1134512
Subtracting mixed numbers works much the same way as adding mixed numbers. To subtract mixed numbers, subtract the whole number parts of the mixed numbers and then subtract the fraction parts in the mixed numbers. Finally, combine the whole number answer and the fraction answer to express the answer as a mixed number.
1318456
['Rewrite the equation as in "Keep, Change, Flip"', 'Keep the first fraction.', 'Change the division sign to multiplication.', 'Flip the second fraction by switching the top and bottom numbers.', 'Multiply all numerators together.', 'Multiply all denominators together.', 'Reduce the result to lowest terms.']
1071140
['Multiply the denominator (bottom) of the fraction by a number to make the denominator equal 100.', 'Multiply the numerator (top) of the fraction by the same number.', 'Take this new numerator and write a % sign after it.']
587065
To do this, you need to find the least common multiple (LCM) of the two denominators. To subtract fractions with unlike denominators, rename the fractions with a common denominator. Then subtract and simplify.
19410
['Make sure the bottom numbers (the denominators) are the same.', 'Subtract the top numbers (the numerators). Put the answer over the same denominator.', 'Simplify the fraction (if needed).']