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Multiplying Fractions When do we Multiply? X of ()() ()2 2y To multiply fractions, we simply multiply numerators, and denominators. Numerators x Numerators.

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Presentation on theme: "Multiplying Fractions When do we Multiply? X of ()() ()2 2y To multiply fractions, we simply multiply numerators, and denominators. Numerators x Numerators."— Presentation transcript:

1 Multiplying Fractions When do we Multiply? X of ()() ()2 2y To multiply fractions, we simply multiply numerators, and denominators. Numerators x Numerators Denominators x Denominators 2 3 x 4 5 Just multiply across 2 x 4 3 x 5 = 8 15

2 On Paper 2 3 x 7 8 5 6 4 5 x 2 x 3 5 Whole numbers are placed over 1. 2 1

3 Changing a mixed number to an improper fraction. 1 1 2 We multiply the WHOLE number and DENOMINATOR and add the NUMERATOR 1 x 2 + 1 2 = 3 2 The Denominator stays the same. 1 1 2 = Whole Number Numerator Denominator 1 1 2 x +

4 On Paper change to improper fractions 2 2 3 2 5 3

5 Changing a improper fraction to a mixed number 23 5 Divide the numerator by the denominator 23 5 4 20 3 Whole Number Numerator Demoninator 4 3 5

6 On Paper change to mixed numbers 34 7 27 4

7 Multiplying Mixed Numbers Now we put it all together. 1 x 3 1 2 3 4 Step 1: Change mixed numbers to Improper Fractions. Step 2: Multiply Across, Numerators and Denominators. Step 3: Change Improper Fractions to Mixed/Whole Numbers. Step 4: Reduce if needed.

8 On Paper 2 x 1 2 3 4 5 Step 1: Change mixed numbers to Improper Fractions. Step 2: Multiply Across, Numerators and Denominators. Step 3: Change Improper Fractions to Mixed/Whole Numbers. Step 4: Reduce if needed.

9 Problem Solving Vivian ate 1/4 her sister ate 1/3 of what remained (3/4) Her brother ate 1/2 of what remained (1/2)

10 3* If the product of 1/2 and 1/2 is subtracted from the sum of 1/2 and 1/2, what is the difference?

11 5* Reduce 16/24 6* 1/8 + 3/8 7* 1/2 x 2/3 8* 7/12 - 3/12

12 14* Convert 18/4 to a mixed number. Remember to reduce the fraction part of the mixed number.

13 21* Compare: 2/3 x 3/2 1

14 24* (1/2 x 1/2) - 1/4

15 26* What fraction is 2/3 of 3/5 ? 27* What is the product of 3/4 and 4/3 ?


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