An explanation in words connects the quantities in a simple addition or subtraction situation—typically within 20—to the operation and equation that represent it, identifying what is known, what is unknown, and why a strategy such as counting on, making a ten, or using a related fact gives the answer. The explanation reflects the meaning of the operation rather than merely reporting a result; formal proof, generalized rules, and multistep arguments are outside this scope.
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Detailed Explanation: Explain a solution in words
When you explain a solution, tell:
- What you know
- What you need to find
- Which operation matches the story
- How your strategy gives the answer
Example: Maya has 8 crayons. Her teacher gives her 5 more crayons. How many crayons does Maya have now?
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We know Maya has 8 crayons and gets 5 more.
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The word more means we join the groups, so we use addition.
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We need to find the total number of crayons.
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We can count on from 8 five times:
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So, the equation is
Maya has 13 crayons. I know this because adding 5 more to 8 gives a total of 13.
Learn by doing: Explain a solution in words
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Practice:
Algebraic Equation from Sentence - Addition and Subtraction
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Download/Modify Free Grade 1 'Explain a solution in words' Worksheet
Print this free 'Explain a solution in words' worksheet to practice this skill away from the computer. Click 'Modify' to easily customize this worksheet to your exact needs.
This Worksheet Includes:
- Algebraic Equation from Sentence - Addition and Subtraction
- Picture Numbers - Adding - Picture to Equation (Within 5)
- Picture Numbers - Adding - Picture to Equation (Within 10)
- Picture Numbers - Adding - Picture to Equation (Within 20)
- One-Step Equation - Addition - Solve
- One-Step Equation - Addition/Subtraction - Solve
- Linear Equation - Solve for Box, Two Terms, Simple Display
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