10/20 Simplifying Fractions

What are the PRIME factors of 48?

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• 2x3x6x12x24

• 2x3x48

• 2,x3

• 2x2x2x2x3

What are the PRIME factors of 180?

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• 2x3x5x15x45x90

• 5x15x45x90

• 2x3

• 2x2x3x3x5

If you are trying to simplify the fraction 48/180, which numbers do you eliminate or cross off?

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• 2, 2, 2, 2, 3 from 48 and 2, 2, 3, 3, 5 from 180

• 2, 2, and 3 from each

• 3 from 48 and 5 from 180

• 5 from 180

Once you've crossed off the common PRIME factors, which factors are left for each number?

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• 48 = 2x2

  180 = 3x5

• 48 = 2x2x3

  180 = 2x2x3

• 48 = 3x6x12x24

  180 = 5x15x45x90

• There are no factors left.

48 = 2x2x2x2x3 =

180 = 2x2x3x3x5 =

The simplest fraction equivalent to 48/180 is _____.

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• 1

Drag and drop to fill in the missing factors for 24 and 40.

a

b

c

d

e

f

Drag and drop the prime factors of 24 and 40.

a

b

c

d

e

f

g

h

Now that we know the PRIME FACTORS of 24 and 40, click the factors that can be eliminated.