# 4.NF.C.5 Use Concrete Referents to Solve Problems

## 4. NF.C.5 Use Concrete Referents to Solve Problems

Evidence Statement 4.C.4-5   Base arithmetic explanations/reasoning on concrete referents such as diagrams (whether provided in the prompt or constructed by the student in her response), connecting the diagrams to a written (symbolic) method. Content Scope: Knowledge and skills articulated in 4.NF.C

### Mrs Miller's Students

Mrs. Miller asked 100 fourth graders to name their favorite subject in school. She found that 3/10 of students named Mathematics, 55/100 named Science, and the rest named other subjects.

## Part A

Write a fraction with a denominator of 100 that is equivalent to 3/10ths. Explain how the model can be used to show both fractions are equivalent.

Model available in attached student copy document

## Part B

What part of the students named Math or Science as their favorite subject? Find the sum of the fractions. Explain how you could use the model to solve.

Model available in attached student copy document