Download Expressions and Equations with Variables

LESSON 9.3
Name
Expressions and Equations with Variables
Find the value of the expression.
1.
54 a if a 6
2.
7 d if d 3
9
3.
5 s if s 11
21
4.
36 x if x 4
55
9
Write an expression that matches the words.
5.
6 times the number of marbles,
m, in a collection
6.
7 pails of seashells times the
number of shells, s, in each pail
6m
7.
7s
72 children divided into equal
groups, g
8.
24 books divided equally
between classrooms, c
72 g
24 c
Write an equation for each. Choose a variable for the unknown.
Tell what the variable represents. Possible variables are given.
9.
An equal number of people in
each of 3 vans is a total of 18
people.
10.
36 bowlers divided equally
among bowling lanes is 4
bowlers per lane.
Use mental math to solve each equation. Check your work.
8 c 32
12.
c4
a 9 45
13.
a5
42 s 7
14.
s6
r36
r 18
Mixed Review
Round each number to the nearest thousand.
15.
7,605
PW46
Practice
16.
14,230
17.
39,824
18.
809,368
© Harcourt
11.
LESSON 9.3
Name
Expressions and Equations with Variables
Find the value of the expression.
1.
54 a if a 6
2.
7 d if d 3
9
3.
5 s if s 11
21
4.
36 x if x 4
55
9
Write an expression that matches the words.
5.
6 times the number of marbles,
m, in a collection
6.
7 pails of seashells times the
number of shells, s, in each pail
6m
7.
7s
72 children divided into equal
groups, g
8.
24 books divided equally
between classrooms, c
72 g
24 c
Write an equation for each. Choose a variable for the unknown.
Tell what the variable represents. Possible variables are given.
9.
An equal number of people in
each of 3 vans is a total of 18
people.
10.
36 bowlers divided equally
among bowling lanes is 4
bowlers per lane.
3 p 18;
36 b 4;
p number of people
b number of bowling lanes
Use mental math to solve each equation. Check your work.
8 c 32
12.
c4
a 9 45
13.
a5
42 s 7
14.
s6
r36
r 18
Mixed Review
Round each number to the nearest thousand.
15.
7,605
8,000
PW46
Practice
16.
14,230
14,000
17.
39,824
40,000
18.
809,368
809,000
© Harcourt
11.