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Multiplying Fractions. When we multiply a fraction by an integer we: multiply by the numerator and divide by the denominator For example, 4 9 54 × = 54.

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Presentation on theme: "Multiplying Fractions. When we multiply a fraction by an integer we: multiply by the numerator and divide by the denominator For example, 4 9 54 × = 54."— Presentation transcript:

1 Multiplying Fractions

2 When we multiply a fraction by an integer we: multiply by the numerator and divide by the denominator For example, 4 9 54 × = 54 ÷ 9 × 4 = 6 × 4 = 24 Multiplying fractions by integers

3 5 7 12 × ?What is 5 7 12 × = 12 × 5 ÷ 7 = 60 ÷ 7 = 60 7 = 8 4 7 Multiplying fractions by integers

4 Using cancellation to simplify calculations 7 12 What is 16 × ? We can write 16 × as: 7 12 16 1 × 7 12 4 3 = 28 3 = 1 3 9

5 8 25 What is × 40?We can write × 40 as: 8 25 8 × 40 1 8 5 = 64 5 = 4 5 12 Using cancellation to simplify calculations


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