The document discusses expressions and how to write and evaluate mathematical expressions based on word problems. It provides examples of word problems that can be represented by addition, subtraction, multiplication, and division expressions. It then gives practice problems for the reader to write the appropriate expression and calculate the value based on word problems about quantities of stamps, money, markers, and other items.

1. Chapter 9
Expressions

2. Words like total, altogether, more, and plus might
tell you to add.
Words like each and per might tell you to multiply.
Words like less than, fewer, and left might tell you
to subtract.
Words like shared and divided might tell you to
divide.
9.1 Expressions

3. Jeff has 4 pages of stamps with 8 stamps
on each page. He uses 5 of the stamps.
How many does he have left?
Problem

4. (4 x 8 ) – 5
Find the value
(4 x 8) - 5
32 - 5
27
Solve

5. Denise had 95 cents. She spent 4 dimes. How
much money does she have?
Choose the expression that matches the words.
(95 - 4) x 10
or
95 - (4 x 10)

6. The teacher divided 30 blue markers equally among 5
boxes. Then she put 1 more red marker in each box.
How many markers are in each box?
Choose the expression
(30 ÷ 5) + 1
or
30 ÷ (5 + 1)

7. Find the value of the expressions
(4 x 6) – 2
24 ÷ 23
( 54 ÷ 9 ) – 1

8. Find the value of the expressions
(23
x 9 ) + 7
46 + ( 15 ÷ 3)
35 ÷ 5 x 32

9. Write an expression to match the words then
find the value.
Lily had 15 postcards. She gave away 8 and then
bought 2 more. How many cards does she have
now.

10. Write an expression to match the words then find the
value.
There are 6 rows with 5 desks in each row and 2
desks not in rows. How many desks are there in
all?