NAME ______________________________ DATE _______________
ACTIVITY
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Story Problems about Unknown Change
Solve each problem. Show your work.
3 Sam had 5 books.
Max gave him some more books.
Then Sam had 7 books.
How many books did Max give Sam?
4 There were 10 birds in a tree.
Some of the birds flew away.
3 birds were left in the tree.
How many birds flew away?