# 2.OA.A.1- Modeling Multi- Step Word Problems_Brooks' Wallet

## 2.OA.1- Modeling Multi-Step Word Problems

Evidence Statement 3.D.2- Solve multi-step contextual problems with degree of difficulty appropriate to Grade 3, requiring application of knowledge and skills articulated in 2.OA.A, 2.OA.B and/or 2.MD.B

### Part A

Brooks has $26 in his wallet and$59 in his room.

He uses some of his money to buy a new game that costs $68. What is the total amount of money that Brooks has left after he buys the game? Enter your answer in the space provided. ### Part B Brooks does chores around the house and earns more money. He now has$45.

How much money did Brooks earn doing chores?

### Part C

The table shows toys at the toy store and the amount of money each item costs. Toy_Store_Table.JPGThe follwing toys are available at the toy store. The cost of each item is listed. Football $23, Drawing Kit$17, Video Game $41, Building Blocks Set$29.

The following toys are avaiable at the toy store. The cost of each item is listed. Football $23.00, Drawing Kit$17.00 ,Video Game $41.00, Building Blocks Set$29.00.

Brooks wants to buy 2 toys from the store.

What two toys can he buy?

Show your work and your explanation to tell how you know Brooks has enough money to buy the toys.

## Scoring Rubric

### Part A

Score of 3- Student response includes each of the following elements.

• Computation component- $17 or 17 dollars • Modeling component- shows correct work of addition • Modeling component- shows correct work of subtraction Sample solution: Addition of the two money amounts ($26 + $59=$85) and the subtraction of the price of the game ($85-$68 = $17). Notes: • Student can get credit for both parts with a single equation such a$26 + $59 -$68= $17 • Student does not need to show an equation, but if an equation is used, the equation must be correct. •$26.00+$59=$85-68=$17 is considered a nonsense equation and is not acceptable. Score of 2- Student response includes 2 of the 3 elements. Or, the student has a computation error but provides a valid strategy. Score of 1- Student response includes 1 of the 3 elements. Score of 0- Student response is incorrect or irrelevant. ### Part B Score of 1- computation component:$34

Score of 0- Student response is incorrect.

### Part C

Score of 2- Student response includes each of the following 2 elements.

• Computation component: Football and Drawing Kit
• Modeling component- The student shows a valid strategy to find the two toys that can be purchased. For example, the student shows the equation $23 +$17= $40. Brooks has$45 so he has enough money to buy the football and drawing kit.

Score of 1- Student response includes 1 of the 2 elements. Or, the student has a computation error, but provides a valid strategy.

Score of 0- Student response is incorrect or irrelevant.