Lesson 11

Subtract Fractions

Est. Class Sessions: 2
X

Mathematical Standards

5.NF.A
Use equivalent fractions as a strategy to add and subtract fractions. (5.NF.A.1, 5.NF.A.2)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP4.
Model with mathematics.
MP5.
Use appropriate tools strategically.
MP8.
Look for and express regularity in repeated reasoning.

Students estimate answers to problems involving subtraction of fractions. They use fraction circle pieces to model and solve subtraction word problems. Students subtract fractions with both like and unlike denominators and explore using multiplication and division strategies to find equivalent fractions with common denominators.

Content in this Lesson

  • Using benchmark fractions and fraction circle pieces to estimate differences [E9].
  • Subtracting fractions including those with unlike denominators using circle pieces and other strategies [E7].
  • Using visual models and equations to represent the solution for word problems [E8].
  • Finding equivalent fractions using tools (e.g., fraction circle pieces) and multiplication strategies [E4].
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide  
Student Activity Book    

Teacher Resources

 Teacher Guide - digital    

Supplies for Students

  • fraction circle pieces

Materials for the Teacher

Assessment in this Lesson

Assessment Expectation Assessed Math Practices Expectation Assessed
Subtract Fractions
Check-In:
Questions 14–20
Student Guide
Page 103
and the corresponding
Feedback Box
Teacher Guide - digital
E4.
Find equivalent fractions using tools (e.g., area models, number lines) and multiplication and division strategies.
E7.
Add and subtract fractions including those with unlike denominators.
E8.
Use visual models or equations to represent the solution for word problems involving adding and subtracting fractions.
E9.
Use benchmark fractions to estimate sums and differences and assess the reasonableness of answers.
MPE2.
Find a strategy. I choose good tools and an efficient strategy for solving the problem.
MPE5.
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.