Practice Workbook SE - East Penn School District

Name
LESSON 9.7
Problem Solving Strategy
Work Backward
Write an equation and work backward to solve.
1. Alexander had some nickels in
his bank. He added 3 dimes to
the bank and then he had 85¢.
How many nickels did
Alexander have?
2. Roz is making a quilt. Yesterday
she sewed some squares. Today
she sewed together 3 rows with
10 squares each. She has sewn
a total of 50 squares. How many
squares did Roz sew yesterday?
Work backward to solve.
3. Leo folded a sheet of paper in
half a certain number of times.
When unfolded, the sheet was
divided into 8 sections. How
many times did Leo fold the
paper in half?
4. Ann is setting a clock. It says
12:00 P.M. She moves the minute
hand forward 10 minutes, back
12 minutes, forward 8 minutes,
and back some minutes. If the
time now reads 12:03 P.M., what
was her final move?
5. Holly is going from her home to
the grocery store. To get to the
store, she walks 3 blocks west
and 2 blocks south. When she
leaves the store, she walks 3
blocks east. How many blocks
and in what direction should
Holly walk to get home?
6. Amy and Tim are playing a
counting game. They are
counting to 30. Amy claps when
they say a number that can be
divided evenly by 3. Tim claps
when they say a number that can
be divided evenly by 4. On what
numbers do they both clap?
© Harcourt
Mixed Review
7. 3
8. 9
9. 9 10. 12 11. 12
8
4
9
6
10
Practice
PW51