Add and Subtract Fractions with Denominators of 10 and 100

5/10 + 1/10 = ?

• 10/10

• 6

• 3/10

• 6/10

To add or subtract fractions you must have

• Common numerators

• Common denominators

• Common multiples

• common factors

If we have common denominators and we want to add or subtract them we need to

• add/subtract the numerator and slide over the denominator.

• add/subtract the numerator and add/subtract the denominator.

Add the Fractions!

• 75/10

• 75/100

• 65/100

• 60/100

Add the Fractions!

• 27/100

• 37/10

• 37/100

• 27/10

Add the Fractions!

• 52/100

• 5/10

• 12/100

• 2/10

50/100 + 25/100 =

• 100/75

• 100/100

• 75/100

• 52/100

What must you have to add and subtract fractions?

• Common numerators

• Different numerators

• Different denominators

• Common denominators

We DO NOT add or subtract the _____________ when doing addition or subtraction with fractions.

• numerators

• denominators

• nouns

• addition signs

The bottom number is called the __________.

• numerator

• denominator