Grade 3 find the mistake
This Grade 3 worksheet practices grade 3 find the mistake (Common Core 3.NBT.A.2, 3.MD.C.7c; Alberta Algebra 1; Alberta Measurement 1).
8 Grade 3 problems with a student's answer to check. Some are right and some are wrong. With an answer key.
8 problems · answer key on the last page · each version has different numbers · Print from the browser
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On this sheet
- Ben measures a leaf that starts at the 9 cm mark and ends at the 15 cm mark. Ben says it is 15 cm long. Is Ben right? — answer: No
- Leo measures a spoon that starts at the 3 cm mark and ends at the 15 cm mark. Leo says it is 15 cm long. Is Leo right? — answer: No
- Ben says 701 − 534 = 233. Is Ben right, and what is 701 − 534? — answer: No, 701 − 534 = 167
How to teach it
- Work the problem yourself first.
- Compare with the student's answer. If they differ, find the step where it went wrong.
- Say what the mistake was and what the right answer is.
Questions teachers ask
- How many problems are on this worksheet?
- 8 on one page, with the answer key on the last page.
- What grade and standard is it for?
- Grade 3. Common Core: 3.NBT.A.2, 3.MD.C.7c. Alberta: Algebra 1, Measurement 1.
- Can I print more than one version?
- Yes. Every version has different numbers and its own answer key. Use “Make another version” for a new one; the same version always prints the same.
- Why are some of the answers right?
- If every answer were wrong, students would only look for an error. Mixing right and wrong answers makes them check each one, which is the skill that matters.
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