Adding & Subtracting Fractions

Which important factor should be present to add or subtract fractions?

• Denominators should be the same.

• Numerators should be different.

• Numerators should be the same.

• Denominators should be different.

Answer explanation

Remember, before we can add or subtract fractions, the fractions need to have a common denominator.

In other words, the denominators must be the same.

You must find the (a) _______ before you can add or subtract fractions with unlike denominators.

• Multiple

• Common denominator

• Common numerator

• Simplified Fraction

Answer explanation

Since the denominators are the same, we could simply focus on only adding the numerators to obtain our answer.

• 3/10

• 3/5

• 3/25

• 15/5

• Add the top parts of the fraction.

• Make each fraction into an improper fraction.

• Rewrite the fractions in the simplest form.

• Find a common denominator.

• 8

• None of the above.

• 5/9

• 10/9

• 4/9

• 3/9