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Three Letter Addends
|Grade Level: 1 |
|Mathematics Domain and Cluster: |
|Domain: Operations and Algebraic Thinking |
|Cluster: Represent and solve problems involving addition and subtraction. |
|Common Core standard(s) being assessed (if the task is intended to assess only one part of the standard, underline that part of the standard): |
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|1.OA.2: Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and |
|equations with a symbol for the unknown number to represent the problem. |
|Student Materials: |
|Student Assessment Task: Three Letter Addends? |
|Pencil |
|Math Tools: Provide tools that students have used to solve problems |
|You may want to gather scrabble letter tiles or create your own pieces by printing tiles on card stock and laminating and cut up paper tiles. |
|Teacher Materials: |
|Materials to keep track of student observation. |
|Directions (for teacher to administer assessment task): |
|Prepare materials: Make copies of assessment task – Three Letter Addends? |
|You may need to demonstrate where to find numbers for each word and |
|Remind students to include a number sentence for each word |
|Prompt: |
|Say: Today we need to figure out who won a spelling game. (You may need to give students background information about the game Scrabble.) |
|Say: We need to find out who spelled the word with the greatest sum. The player who spelled the word with the greatest sum is the winner. |
|Read directions on assessment task. |
|Show students where they can find how much each letter is worth. |
|Correct or Model Answer: |
| |
|Student should solve the problem by adding the numbers on each tile. |
|They should include an equation to show how they calculated the sum for each word. |
|They should then answer the question: “Which word has the greatest sum or points?” |
|Also student will answer the question: “Which word has the smallest sum?” |
| |
|Note: Answer will vary depending on words each child spells. |
|Scoring Guide/Rubric (a score should be awarded for each criterion below) |
|Criteria (CCSS code) |0 points |1 Point |2 Point |
|Solve word problems that call for |Student may or may not be able to |Student able to solve a word problem |Student able to accurately solve a |
|addition of three whole numbers whose|solve a word problem that requires |that requires the addition of three |word problem that requires the |
|sum is less than or equal to 20. |addition of three whole numbers even |whole numbers with minor inaccuracies. |addition of three whole numbers |
|(1.OA.2) |with assistance. |(e.g., may have transposed amounts | |
| | |incorrectly). | |
|Using objects, drawings, and |Student may not be able to show their|Student able to show their work, and |Student able to show their work, and|
|equations to represent the problem. |work, and write an equation to |write an equation to represent the |write an equation to represent the |
|(1.OA.1) |represent the problem. |problem. |problem. |
Name Date
Three Letter Addends
1. How many three letter words can you make using the letter tiles?
2. Find the sum of each word by adding up the numbers on each tile.
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|Three Letter Words |Find the Sum |
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3. Which word has the greatest sum? Explain your thinking.
4. Which word has the smallest sum? Explain your thinking.
[pic]
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