Section 1
Rule for Adding Fractions with Like Denominators
Property
To add fractions with like denominators, add the numerators and keep the denominator the same.
This can be represented on a number line as combining lengths from a starting point.
In this Grade 5 Eureka Math lesson from Chapter 15, students learn to make equivalent fractions by expressing them as sums of fractions with like denominators, using number lines and addition sentences to model relationships such as 1/3 + 1/3 = 2/3. The lesson builds on prior knowledge of equivalent fractions and connects repeated addition to multiplication of unit fractions. Students also practice finding missing numerators and denominators to reinforce fraction equivalence fluency.
Section 1
Rule for Adding Fractions with Like Denominators
To add fractions with like denominators, add the numerators and keep the denominator the same.
This can be represented on a number line as combining lengths from a starting point.
Section 2
Repeated Addition of Fractions as Multiplication
Any fraction can be understood as the repeated addition of the unit fraction .
This sum can be expressed as a multiplication equation where the numerator 'a' is the number of times the unit fraction is added.
Section 3
Decompose an Improper Fraction as a Sum
An improper fraction can be decomposed into a sum of a whole number and a fraction. To do this, pull out groups of fractions that equal one whole.
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Section 1
Rule for Adding Fractions with Like Denominators
To add fractions with like denominators, add the numerators and keep the denominator the same.
This can be represented on a number line as combining lengths from a starting point.
Section 2
Repeated Addition of Fractions as Multiplication
Any fraction can be understood as the repeated addition of the unit fraction .
This sum can be expressed as a multiplication equation where the numerator 'a' is the number of times the unit fraction is added.
Section 3
Decompose an Improper Fraction as a Sum
An improper fraction can be decomposed into a sum of a whole number and a fraction. To do this, pull out groups of fractions that equal one whole.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter