2nd grade find the mistake in addition and subtraction worksheets
Your child checks someone else's addition or subtraction, decides whether the answer is right, and picks the correct answer when it is wrong.
Common Core 2.NBT.B.9 (Number and Operations in Base Ten)
Sample problems
- Sample 1A student worked out 44 ā 17 and got 33. Which is true?
A. The student is right.
B. The answer should be 61.
C. The answer should be 27.Answer: C
- Sample 2A student worked out 27 + 19 and got 36. Which is true?
A. The answer should be 8.
B. The student is right.
C. The answer should be 46.Answer: C
- A bit harderA student worked out 42 ā 17 and got 35. Which is true?
A. The answer should be 59.
B. The student is right.
C. The answer should be 25.Answer: C
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