NAVIGATION






Mrs. Tait's & Mrs. Fleischhauer's Class


Grade 4 - Room 202

Unit 8 (BIM Math) - Add and Subtract Fractions



Chapter 8 - Add and Subtract Fractions

In this chapter, your student is learning to add and subtract fractions and mixed numbers with like denominators. Area model and number lines are used to help students visualize the operations. The vocabulary words for this chapter are mixed number and unit fraction.

There are many real life situations in which your student can practice adding and subtracting fractions. Here are a few you may want to try.

  • Involve your student in the measurements of home improvement projects. Show how addition and subtraction of fractions are used. Ask your student questions such as, “If I buy a 24-inch board and cut a piece inches long, how much is left over?”
  • When getting ready for a family activity or errand, ask questions that involve fractional amounts of time. For example, “If it takes of an hour to go to the bowling alley,  of an hour to bowl, and  of an hour to go home, how much time will we spend away from home?”
  • Model real-life situations that require adding and subtracting with recipes. For example, say, “A recipe calls for of a cup of flour and
     of a cup of sugar. How much more flour than sugar does the recipe call for?”

By the end of this chapter, your student should feel confident with the learning targets and success criteria. Encourage your student to think of other fractions and mixed numbers.

Enjoy exploring addition and subtraction of fractions with your student!

Lesson

Learning Target

Success Criteria

8.1 Use Models to Add Fractions

Use area models and number lines to add fractions

·       I can use an area model to add fractions.

·       I can use a number line to add fractions.

·       I can explain what it means to add fractions.

8.2 Decompose Fractions

Write a fraction as a sum of fractions.

·       I can write a fraction as a sum of unit fractions.

·       I can write a fraction as a sum of two fractions.

·       I can write a fraction as a sum of fractions in more than one way.

8.3 Add Fractions with Like Denominators

Add fractions with like denominators.

·       I can use models to add fractions.

·       I can use a rule to add fractions.

·       I can explain how to add fractions with like denominators.

8.4 Use Models to Subtract Fractions

Use area models and number lines to subtract fractions.

·       I can use an area model to subtract fractions.

·       I can use a number line to subtract fractions.

·       I can explain what it means to subtract fractions.

8.5 Subtract Fractions with Like Denominators

Subtract fractions with like denominators.

·       I can use models to subtract fractions.

·       I can use a rule to subtract fractions.

·       I can explain how to subtract fractions with like denominators.

8.6 Model Fractions and Mixed Numbers

Write mixed numbers as fractions and fractions as mixed numbers.

·       I can model a mixed number.

·       I can write a mixed number as a fraction.

·       I can write a fraction greater than 1 as a mixed number.

8.7 Add Mixed Numbers

Add mixed numbers with like denominators.

·       I can add fractional parts and whole number parts of mixed numbers with like denominators.

·       I can use equivalent fractions to add mixed numbers with like denominators.

·       I can explain two ways to add mixed numbers with like denominators.

8.8 Subtract Mixed Numbers

Subtract mixed numbers with like denominators.

·       I can subtract fractional parts and whole number parts of mixed numbers with like denominators.

·       I can use equivalent fractions to subtract mixed numbers with like denominators.

·       I can explain two ways to subtract mixed numbers with like denominators.

8.9 Problem Solving: Fractions

Solve multi-step word problems involving fractions and mixed numbers.

·       I can understand a problem.

·       I can make a plan to solve.

·       I can solve a problem using an equation.

 


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