1. Peter had 48 baseball cards. He gave some to
Mike and then he had 35 left. How many cards
cards did Peter give to Mike?
2. A pet store had 75 goldfish in a tank. The
store sold some goldfish, leaving 43 goldfish in the
tank. How many goldfish did the pet store sell?
3.
A bus
George
driver
hadfact
61
picked
pennies.
up you
passengers
He gave
some
at
the
pennies
firstto
What
basic
could
use to
find
the
stop.
his
sister.
32
Now
George
got
has
on50
the
pennies.
bus at the
Howsecond
many
product
ofmore
30
xpeople
4? Find
the
product.
stop. If did
pennies
there
George
weregive
a total
to his
of 56
sister?
people on the
bus, how many people got on at the first stop?
4. 100 cupcakes were on the table at a party.
Some cupcakes were eaten. 11 cupcakes were left
on the table. How many cupcakes were eaten?
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5. 43 children were at the playground. At one
o'clock some children went home for lunch.
20 children stayed at the playground. How many
children went home for lunch?
6. A teacher bought 75 pencils for her class.
One week later some pencils were missing.
59 pencils were left. How many pencils were
missing?
7. 34 birds sat in a tree. When a cat climbed the
tree some birds flew away. 15 birds stayed in the
tree. How many birds flew away?
8. Lisa had 45 books. She donated some books to
the school fair. Now Lisa has 29 books. How many
books did Lisa donate to the school
fair?
©K-5MathTeachingResources.com
Take From: Change Unknown Problems
Solve all problems. Use a symbol for the unknown to represent each problem.
1.
2.
3.
4.
©K-5MathTeachingResources.com
Take From: Change Unknown Problems
Solve all problems. Use a symbol for the unknown to represent each problem.
5.
6.
7.
8.
©K-5MathTeachingResources.com