Teacher:



Teacher: |Subject/Grade: 6 |Date: 7/24/06 | |

|Framework: 6.N.14 Accurately and efficiently add, subtract, multiply, and divide positive fractions and mixed numbers. Simplify fractions. |

|Objective (what should |Students will add and subtract fractions by finding common denominators and simplify fractions into lowest terms. |

|students know and be able to | |

|do) | |

|Materials |Visual aids showing equivalent fractions |

| |Worksheet with add/sub equations involving fractions |

| |Paper plate fractions, 4/4, 3/3, 12/12 (cut out ¼ from whole, 1/3 from whole, and leave 12/12 whole) |

|Vocabulary |Equivalent fraction, numerator, denominator, common denominator, simplify |

|Launch |Review simplifying fractions: 2/10, 3/12, 24/36 then equivalent fractions: 1/3, then 1/4 |

| |1. State a problem: You order two identical pizzas for a group of friends. One of the pizzas is cut into four slices and |

| |the other is cut into three slices. After everyone has eaten, there is one slice of each pizza left. How much of a whole |

| |pizza is left altogether? How should you cut the two remaining slices up into smaller slices so that all the new slices are |

| |the same size? |

| |2. State the purpose of having a common denominator so to add unlike fractions. Record ¼ and 1/3 on chart paper and have |

| |students give you several equivalent fractions for each one. |

| |3. Circle the fractions that have common denominators for ¼ and 1/3.(HINT: choose one in lowest terms so you won’t have to|

| |simplify). |

| |4. Add the fractions and show that 7/12 is the same as ¼ + 1/3. |

|Explore |Students will add and subtract fractions using this method. The worksheet that I made has the equation on the left |

| |(vertically written) and two lines on the right to list several equivalent fractions. Students will add and subtract given |

| |fractions. Simplify if necessary. |

| |*Students may use any visuals to help them find equivalent fractions. |

|Summarize | |

|Homework | |

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