meredith redding. mcc.4.nf.3 understand a fraction a/b with a > 1 as a sum of fractions 1/b. a....

ALL ABOUT ADDING FRACTIONS

Meredith Redding

Standards

MCC.4.NF.3 Understand a fraction a/b with a > 1 as a sum of fractions 1/b.

a. Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.

What is a fraction? And some vocab.

A fraction is part of a whole. Vocabulary

- denominator- total number of parts - numerator- the part taken from the

whole - mixed number- a whole number plus a

fraction.

Types of fractions

Improper fractions- when the numerator is bigger than the denominator.

Proper fraction- when the numerator is smaller than the denominator.

Mixed number- a whole number plus a fraction.

Equivalent- when two fractions with different numerators and denominators are equal.

Some examples of fractions

½- proper fraction 2 ¼ - mixed number 2/4 – proper fraction- equivalent 4/3 – improper fraction 3/3- this equals 1 whole

What to do when adding fractions

Adding or subtracting fractions is adding to and taking away from the same whole.

So ….. You cannot add or subtract fractions with different denominators.

You make sure that the fraction has a common denominator, and then you can add the numerators.

When adding fractions you do not add denominators.

Some examples

¼ + 2/4 = ¾ ½ + ¾ = 5/4 = 1 ¼ 3/6 + 2/6 = 5/6 1/3 + 1/6 = 3/6 = ½