Word Problems Within 20
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Word Problems Within 20
Word problems within 20 for Grade 1: six addition and subtraction stories to join, take away or put together, such as marbles given or children who get off a bus. With an answer key.
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Teach it first
Word Problems Within 20A teaching handout to hand out before this sheet: the rule, worked examples and common mistakes.- Pages
- 1
- Last updated
- Time
- About 20 minutes
- Answer key
- Included
- Printing
- Black and white
- Related curriculum
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Solve word problems that join, take away, put together, take apart and compare, with the unknown in any place, using drawings, number lines and equations, from within 10 in Kindergarten to within 1,000 in Grade 3.
Reviewed by Mrs. Jennifer Mitchell, Teacher. How we check worksheets
How to use this sheet
- Read each problem aloud together and ask the child to retell the story in their own words before solving.
- Have the child draw a quick picture or a bar model, then write a number sentence that matches it.
- Ask the child to say the answer as a sentence with its unit: "There are 12 apples left."
Common mistakes
- Choosing the operation from one key word, so "more" always means add. "How many more" often means subtract. Act the story out.
- Using every number in the problem, even one that is not needed. Ask which numbers the question is about.
- Answering a different question, such as the total when the problem asks how many are left. Underline the question.
- For two-step problems, stopping after the first step. Ask "Does this answer the question yet?"
