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Grade 2 Change-unknown word problems Worksheets

Grade 2 practice: Find an unknown amount added or taken away in a real-world story. Choose a level below to generate a fresh set of questions.

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Understanding change-unknown word problems

Change-unknown word problems describe a starting amount and a known result, then ask for the hidden amount that was added or taken away in between. Learners read the story, see that the change is the missing part, and work out whether to add or subtract to find it. This is important because it moves beyond simple totals and teaches children that the unknown in a story is not always the final answer.

For example, a story might say Sam had 5 marbles, found some more, and then had 9. To find how many he found, the child reasons 9 − 5 = 4 marbles. A common mistake is to add the two given numbers, writing 5 + 9, because both numbers appear in the problem. A helpful tip is to picture a start, a change, and an end, mark which part is unknown, and remember that finding a missing change between a smaller start and a larger end means subtracting.

Sample change-unknown word problems questions

These examples come from the Easy setting. Generate a worksheet for a complete page with space for working.

  1. Grace had 18 shells and gave some away. 16 remained. How many were given away?
  2. Ben had 23 stickers and gave some away. 21 remained. How many were given away?
  3. Eva had 13 beads. After receiving some more, there were 25. How many were received?
  4. Eva had 16 shells and gave some away. 13 remained. How many were given away?
Check the sample answers
  1. 2
  2. 2
  3. 12
  4. 3

Practice focus

Find an unknown amount added or taken away in a real-world story. Write a number sentence and label the answer.

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