## Lesson Plan # 7 - Fraction multiplication

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- (5 min) Mental Math
- Start with 30, subtract 12, then divide by 3 [6]
- What is 30 times 4? [120]
- What is 30 times 40? [1200]
- What is 30 times 400? [12000]
- What is 300 times 4? [1200]

- (5 min) Review of selected problems from Homework # 6 (<= 3
problems)

- (15 min) Introduce fractions:

- Discuss what a fraction is: a part of a whole, a number between
zero and 1. It has a numerator and a denominator. The denominator
is the number of parts the whole is cut up into. The numerator is the
number of those parts that you have. Illustrate with a pizza drawn on
the board. Cut the pizza into 8 pieces and ask students how many pieces
they can eat.
- Handout the "Fraction rules" handout and discuss the
following concepts (go through the examples for each):
- Fraction multiplication
- Converting mixed numbers to improper fractions

- Have students turn over the handout to the "Area of a triangle"
discussion and discuss the fraction version of the triangle area formula.
Have them work the first fraction example near the bottom of the page.

- (Remainder of class) In-class Exercise.
- Hand out homework as students successfully complete the in-class
exercise.