3.OA.D.8 Modeling Two Step Word Problems

Evidence Statement 3.D.1 Solve multi-step contextual word problems with degree of difficulty appropriate to Grade 3, requiring application of knowledge and skills articulated in Type 1 Evidence Statements.

Mr. Garcia's Class

Part A

Mr. Garcia bought 142 markers and pencils for his class. 

Each box of markers had 8 markers in it.  

He bought 7 boxes of pencils with 10 pencils in each box.    

• Write an equation to find the total number of markers Mr. Garcia bought.
• Write an equation to find the number of  boxes of markers Mr. Garcia bought?

Enter your equations in the space provided.

Part B

Mr. Garcia gave 12 pencils to his students.  

• Write an equation to show how many pencils Mr. Garcia had left.
• Use p as the unknown number of pencils Mr. Garcia has left in your equation.

Enter your equation in the space provided.

Student Copy

Scoring Rubric Part A

Score 4

Student response includes the following elements.

Computation Component

• The student provides the correct total number of markers.
• The student provides the correct number of boxes of markers.

Modeling Component

• Valid method to determine the total number of markers.
• Valid method to determine the number of boxes of markers.

Sample Student Response:

7 x 10 = 70

142 – 70 = 72

72 markers

72 ÷ 8 = 9

Mr. Garcia bought 9 boxes of markers.

Score 3

Student response includes three of the elements.

Score 2

Student response includes two of the elements.

Score 1

Student response includes one of the elements.

Score 0

Student response is incorrect. 

Scoring Rubric Part B

Score 1

Student response includes the following elements.

Modeling Component

• An equation, with a letter representing the unknown, that could be used to find the number of pencils Mr. Garcia had left.

Sample Student Response:

72 - 12 = p, 12 + p = 72