Adding and subtracting fractions and mixed numbers

Question

Dwayne Hood · Accepted Answer

Step 1Here&#039;s an example: let&#039;s subtract   3      3    5   from   4      1    3  . First you find the LCD; here it&#039;s 15.  4      1    3    −  3      3    5      4      5    15    −  3      9    15  Write both fractions as equivalent fractions with a denominator of 15.  3  +  1      5    15    −  3      9    15      3  +      20    15    −  3      9    15  Since you&#039;re trying to subtract a larger fraction from a smaller one, you need to &quot;borrow&quot; a one from the integer 4, change it to       15    15   , and add it to the fraction.  3      20    15    −  3      9    15        11    15  Now the problem becomes   3      20    15   minus   3      9    15   and the answer is       11    15

musicintimeln · Accepted Answer

Step 1Rewrite the mixed numbers as fractions.  (  5     and         1    2    )  +      3    4    +  1    =  (  5  +      1    2    )  +      3    4    +  1    =  (      10    2    +      1    2    )  +      3    4    +  1    =            10      +      1        2    +      3    4    +  1    =      11    2    +      3    4    +  1    =      22    4    +      3    4    +      4    4      =            22      +      3      +      4        4      =      29    4      =            28      +      1        4      =      28    4    +      1    4      =  7  +      1    4      =  7     and         1    4

Adding and subtracting fractions and mixed numbers

Answered question

Answer & Explanation

New Questions in Pre-Algebra