Grade 7 find the mistake
This Grade 7 worksheet practices grade 7 find the mistake (Common Core 7.EE.A.1, 7.EE.B.4; Alberta Patterns and Relations 5; Alberta Patterns and Relations 3).
8 Grade 7 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 rock's mass as 629 grams. The rock's mass is really 740 grams. Cleo divides 111 by 629 and says the percent error is about 17.6%. What is the percent error of the measurement? — answer: 15
- Ben says −1.08 + (−7.19) = 8.27. Is Ben right? — answer: No: the answer is −8.27
- The list shows how many goals each team scored: 7, 7, 9, 11, 1. The mean is 7. Ana adds up each value minus the mean, gets 0, and says the mean absolute deviation is 0. What is the mean absolute deviation of the data? — answer: 2.4
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 7. Common Core: 7.EE.A.1, 7.EE.B.4. Alberta: Patterns and Relations 5, Patterns and Relations 3.
- 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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