Subtracting Fractions with Common Denominators

Subject: Math, Numbers and Operations Fractions

Type: 1 Lesson Plan

Skills:

• Collaborate with peers to practice the "language" of math
  • Construct viable arguments and critique the reasoning of others
• Practice subtracting fractions using number lines, grids and puzzle models in order to model with mathematics
• Decompose a fraction into a sum of fractions with the same denominator in more than one way
• Solve real world tasks involving subtraction of like fractions
• Rename improper fractions as equivalent mixed numbers
• Complete an exit slip to help you determine next instructional steps

Materials Needed:

• Blank paper (1 per student) and/or small individual white boards for each student
• Document camera or white board

Printable Resources:

• Student Copies:
  • “Exit Slip” (1 copy per student)
  • “Subtracting Fractions with Common Denominators”’ worksheet (print double sided if possible) (1 copy per student)
  • “Subtracting Fractions Puzzles”’ worksheet (1 copy per student)
• Teacher Copies:
  •  “Exit Slip” Answer Key
  •  “Addition of Fractions” poster  (1 copy for display)
  • “Subtracting Fractions” poster  (1 copy for display)
  •  “Subtracting Mixed Numbers” poster (1 copy for display)
  •  “Subtracting Fractions with Common Denominators”’ Answer Key (1 copy for display)

CCSS: 4.NF.3