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These grade 1 change-unknown word problems worksheets are made for Grade 1 learners, with four difficulty levels so you can match the practice to the child.

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Grade 1 Change-unknown word problems Worksheets

Grade 1 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.

Finn had 6 cards. After receiving some more, there were 7. How many were received?
Finn had 2 stickers and gave some away. 0 remained. How many were given away?
Finn had 9 cards. After receiving some more, there were 10. How many were received?
Chloe had 2 shells and gave some away. 1 remained. How many were given away?

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Practice focus

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

Grade 1 Change-unknown word problems Worksheets

Understanding change-unknown word problems

Sample change-unknown word problems questions

Practice focus

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