Learning target

           adding and subtracting decimal with common and unlike denominators and justify your solutions using manipulativea and mathimatical reasoning

Examples

         6/7 +  2/5 = 44/35 or 1 9/35

        /     \     |   \

        30/35+14/35= 44/35 or 1 9/35

         |         /        _/

        30+14=44 the denominator stays 35

       8/9 +7/9=15/9 or 1 6/9

          \      |

             8+7=15

Lesson

        To find the sum of 2 fractions you first find the LCD or the least common denominator.  Next, you multiply the numerator by the same number you multiplied the denominator to get the fractions. Then, you add the numerators to get the sum.  Last, (you may not have to do this.) simplify the fraction to get a mixed number.  If the denominaters are the same, add the numerators and you then simplify.

        http://www.aaamath.com/fra66k-addfracud.html