Adding Fractions with Common Denominators

Subject: Math, Numbers and Operations Fractions

Type: 1 Lesson Plan

Skills:

• Collaborate with peers to practice the "language" of math and construct viable arguments
• Decompose a fraction into a sum of fractions with the same denominator in more than one way
• Rename improper fractions as equivalent mixed numbers and reinforce their understanding by visually by modeling with mathematics
• Add mixed numbers with like denominators, e.g., by replacing each mixed number with an equivalent fraction, and/or by using properties of operations and the relationship between addition and subtraction
• Solve word problems involving addition and subtraction of fractions referring to the same whole and having like denominators, e.g., by using visual fraction models and equations to represent the problem
• Construct viable arguments and critique the reasoning of others
• 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)
  • “Adding Fractions with Common Denominators”’ worksheet (print double sided if possible) (1 copy per student)
  • “Adding Fractions Puzzles”’ worksheet (1 copy per student)
  • “Real World Problem Solving”’ worksheet (1 copy per groups)
•  Teacher Copies:
  •  “Introduction Problem” poster (1 copy for display)
  •  “Number Line Example” poster (1 copy for display)
  • “Adding Fractions with Common Denominators” Answer Key (1 copy for display)

CCSS: 4.NF4.3, Standards of Math Practices 3, 4