Add & Subtract With Unlike Denominators StudyJam

Learning Resource Type

Classroom Resource

Subject Area

Mathematics

Grade(s)

5, 6

Overview

In this interactive activity, students will be led through steps to add and subtract fractions with unlike denominators. There are teaching activities as well as practice activities available. A handout that reviews the strategies taught in the activity can be printed. After utilizing this resource, the students can complete the short quiz to assess their understanding.

Mathematics (2019) Grade(s): 5

MA19.5.9

Model and solve real-word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, using visual fraction models or equations to represent the problem. Use benchmark fractions and number sense of fractions to estimate mentally, and assess the reasonableness of answers.

UP:MA19.5.9

Vocabulary

  • Fraction
  • Benchmark fraction
  • Denominator
  • Fraction model
  • Estimate
  • Reasonableness
  • Equation
  • Unlike denominator
  • Unlike units

Knowledge

Students know:
  • The meaning and magnitude of fractions expressed in units of halves, fourths, eighths, thirds, sixths, twelfths, fifths, tenths, and hundredths.
  • Strategies to find sums of two or more fractions with like denominators.
  • Strategies to find the difference of two fractions with like denominators.
  • How to decompose a fraction greater than 1 and express as a mixed number.
    Example: 7/3 = 3/3 + 3/3 + 1/3 = 2 1/3.

Skills

Students are able to:
  • Solve real-word problems involving addition and subtraction of fractions with unlike denominators.
  • Represent problems using fraction models or equations.
  • Assess reasonableness of answers using estimation and benchmark fractions.

Understanding

Students understand that:
  • solving word problems involving addition and subtraction of fractions with unlike units
  • Require strategies to find equivalent fractions in a common unit, and the sum or difference will be expressed in the common unit.
  • Can be assessed for reasonableness of answers using estimation strategies.
Mathematics (2019) Grade(s): 5

MA19.5.10

Add and subtract fractions and mixed numbers with unlike denominators, using fraction equivalence to calculate a sum or difference of fractions or mixed numbers with like denominators.

UP:MA19.5.10

Vocabulary

  • Fraction
  • Denominator
  • Numerator
  • Visual Model
  • Sum
  • Difference
  • Equivalence
  • Unlike denominators
  • Unlike units

Knowledge

Students know:
  • Strategies to determine if two given fractions are equivalent.
  • How to use a visual model to illustrate fraction equivalency.
  • Contextual situations for addition and subtraction.

Skills

Students are able to:
  • Use fraction equivalence to add and subtract fractions and mixed numbers with unlike denominators.

Understanding

Students understand that:
Addition and subtraction of fractions and mixed numbers with unlike units,
  • Require strategies to find equivalent fractions in a common unit, and the sum or difference will be expressed in the common unit.
  • Can be assessed for reasonableness of answers using estimation strategies.
Mathematics (2019) Grade(s): 6

MA19.6.8

Find the greatest common factor (GCF) and least common multiple (LCM) of two or more whole numbers.

UP:MA19.6.8

Vocabulary

  • Greatest common factor
  • Least common multiple
  • Exponential Form
  • Prime Factorization
  • Factors
  • Multiples
  • Prime
  • Relatively Prime
  • Composite

Knowledge

Students know:
  • Strategies for determining the greatest common factor of two or more numbers,
  • Strategies for determining the least common multiple of two or more numbers,
  • Strategies for determining the prime factorization of a number.

Skills

Students are able to:
  • Apply strategies for determining greatest common factors and least common multiples.
  • Apply strategies for determining the product of a number's prime factors in multiple forms which include exponential form and standard form.

Understanding

Students understand that:
  • Determining when two numbers have no common factors other than one means they are considered relatively prime.
  • Composing and decomposing numbers provides insights into relationships among numbers.

CR Resource Type

Interactive/Game

Resource Provider

http://studyjams.scholastic.com/

License Type

Custom

Accessibility

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