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Math Problems
Grade 8
Write variable expressions: word problems
A class bought the teacher a gift card worth
g
g
g
dollars. Each student contributed
5
5
5
dollars. Choose the expression that shows how many students are in the class.
\newline
Choices:
\newline
(A)
g
5
\frac{g}{5}
5
g
\newline
(B)
g
−
5
g - 5
g
−
5
\newline
(C)
5
g
5g
5
g
\newline
(D)
g
+
5
g + 5
g
+
5
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Mr. Kelly bought some notebooks for his students, and
g
g
g
were green and
12
12
12
were red. Choose the expression that shows how many notebooks Mr. Kelly bought in all.
\newline
Choices:
\newline
(A)
12
12
12
\newline
(B)
g
+
12
g + 12
g
+
12
\newline
(C)
g
−
12
g - 12
g
−
12
\newline
(D)
12
−
g
12 - g
12
−
g
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Mitch has
2
2
2
model cars. He has
m
m
m
more model planes than model cars. Choose the expression that shows how many model planes Mitch has.
\newline
Choices:
\newline
(A)
m
−
2
m - 2
m
−
2
\newline
(B)
2
2
2
\newline
(C)
2
−
m
2 - m
2
−
m
\newline
(D)
2
+
m
2 + m
2
+
m
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Trudy bought a bag of
30
30
30
sour candies. She ate
c
c
c
of the candies. Choose the expression that shows how many sour candies Trudy has now.
\newline
Choices:
\newline
(A)
30
+
c
30 + c
30
+
c
\newline
(B)
30
−
c
30 - c
30
−
c
\newline
(C)
c
c
c
\newline
(D)
c
−
30
c - 30
c
−
30
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The lacrosse team sold
s
s
s
team booster sweatshirts, and
19
19
19
of them were adult sizes. Choose the expression that shows how many sweatshirts were not adult sizes.
\newline
Choices:
\newline
(A)
19
19
19
\newline
(B)
s
−
19
s - 19
s
−
19
\newline
(C)
s
+
19
s + 19
s
+
19
\newline
(D)
19
−
s
19 - s
19
−
s
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Lara is
3
3
3
inches shorter than Eli. Eli is
i
i
i
inches tall. Choose the expression that shows how many inches tall Lara is.
\newline
Choices:
\newline
(A)
3
−
i
3 - i
3
−
i
\newline
(B)
i
+
3
i + 3
i
+
3
\newline
(C)
i
i
i
\newline
(D)
i
−
3
i - 3
i
−
3
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Tammy has already read
b
b
b
of the
6
6
6
books in the PY Dragons series. Choose the expression that shows how many books Tammy has left to read.
\newline
Choices:
\newline
(A)
6
+
b
6 + b
6
+
b
\newline
(B)
6
−
b
6 - b
6
−
b
\newline
(C)
b
b
b
\newline
(D)
b
−
6
b - 6
b
−
6
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There were
15
15
15
kids at the park. When it began to rain,
k
k
k
of them went home. Choose the expression that shows the number of kids left at the park.
\newline
Choices:
\newline
(A)
15
15
15
\newline
(B)
15
+
k
15 + k
15
+
k
\newline
(C)
k
−
15
k - 15
k
−
15
\newline
(D)
15
−
k
15 - k
15
−
k
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A store clerk put
v
v
v
cans of vegetable soup and
15
15
15
cans of chicken soup on a shelf. Choose the expression that shows how many cans of soup the clerk handled in all.
\newline
Choices:
\newline
(A)
v
−
15
v - 15
v
−
15
\newline
(B)
15
−
v
15 - v
15
−
v
\newline
(C)
15
15
15
\newline
(D)
v
+
15
v + 15
v
+
15
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Mitch has
2
2
2
model cars. He has
m
m
m
more model planes than model cars. Choose the expression that shows how many model planes Mitch has.
\newline
Choices:
\newline
(A)
2
2
2
\newline
(B)
2
+
m
2 + m
2
+
m
\newline
(C)
m
−
2
m - 2
m
−
2
\newline
(D)
2
−
m
2 - m
2
−
m
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There are
y
y
y
yellow dogs out of a total of
12
12
12
dogs at obedience class. Choose the expression that shows the number of dogs that are not yellow.
\newline
Choices:
\newline
(A)
y
y
y
\newline
(B)
12
−
y
12 - y
12
−
y
\newline
(C)
12
+
y
12 + y
12
+
y
\newline
(D)
y
−
12
y - 12
y
−
12
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There were
15
15
15
kids at the park. When it began to rain,
k
k
k
of them went home. Choose the expression that shows the number of kids left at the park.
\newline
Choices:
\newline
(A)
k
−
15
k - 15
k
−
15
\newline
(B)
15
15
15
\newline
(C)
15
−
k
15 - k
15
−
k
\newline
(D)
15
+
k
15 + k
15
+
k
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There were
f
f
f
frogs in a pond. Then
2
2
2
of the frogs hopped away. Choose the expression that shows how many frogs are in the pond now.
\newline
Choices:
\newline
(A)
f
−
2
f - 2
f
−
2
\newline
(B)
2
−
f
2 - f
2
−
f
\newline
(C)
f
+
2
f + 2
f
+
2
\newline
(D)
f
f
f
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The team ordered
3
3
3
cheese pizzas for the year-end party. They ordered
p
p
p
more pepperoni pizzas than cheese pizzas. Choose the expression that shows how many pepperoni pizzas the team ordered.
\newline
Choices:
\newline
(A)
3
−
p
3 - p
3
−
p
\newline
(B)
3
+
p
3 + p
3
+
p
\newline
(C)
p
p
p
\newline
(D)
p
−
3
p - 3
p
−
3
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Lexi bought a package with
t
t
t
cat treats. She gave
2
2
2
of the treats to her cat. Choose the expression that shows the number of treats remaining.
\newline
Choices:
\newline
(A)
t
+
2
t + 2
t
+
2
\newline
(B)
2
−
t
2 - t
2
−
t
\newline
(C)
2
2
2
\newline
(D)
t
−
2
t - 2
t
−
2
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Mr. Kelly bought some notebooks for his students, and
g
g
g
were green and
12
12
12
were red. Choose the expression that shows how many notebooks Mr. Kelly bought in all.
\newline
Choices:
\newline
(A)
12
−
g
12 - g
12
−
g
\newline
(B)
12
12
12
\newline
(C)
g
+
12
g + 12
g
+
12
\newline
(D)
g
−
12
g - 12
g
−
12
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Luther's tomato plant has
t
t
t
more tomatoes than Annie's plant. Annie's plant has
8
8
8
tomatoes. Choose the expression that shows the number of tomatoes on Luther's plant.
\newline
Choices:
\newline
(A)
8
−
t
8 - t
8
−
t
\newline
(B)
8
+
t
8 + t
8
+
t
\newline
(C)
t
−
8
t - 8
t
−
8
\newline
(D)
8
8
8
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Trudy bought a bag of
30
30
30
sour candies. She ate
c
c
c
of the candies. Choose the expression that shows how many sour candies Trudy has now.
\newline
Choices:
\newline
(A)
30
−
c
30 - c
30
−
c
\newline
(B)
c
−
30
c - 30
c
−
30
\newline
(C)
30
+
c
30 + c
30
+
c
\newline
(D)
c
c
c
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The lacrosse team sold
s
s
s
team booster sweatshirts, and
19
19
19
of them were adult sizes. Choose the expression that shows how many sweatshirts were not adult sizes.
\newline
Choices:
\newline
(A)
s
+
19
s + 19
s
+
19
\newline
(B)
19
−
s
19 - s
19
−
s
\newline
(C)
19
19
19
\newline
(D)
s
−
19
s - 19
s
−
19
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Last month, the kitten weighed
3
3
3
pounds. Since then, it has gained
p
p
p
more pounds. Choose the expression that shows how many pounds the kitten weighs now.
\newline
Choices:
\newline
(A)
3
+
p
3 + p
3
+
p
\newline
(B)
p
−
3
p - 3
p
−
3
\newline
(C)
3
−
p
3 - p
3
−
p
\newline
(D)
p
p
p
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The chef chopped
14
14
14
red peppers and
g
g
g
green peppers. Choose the expression that shows how many peppers the chef chopped in all.
\newline
Choices:
\newline
(A)
14
+
g
14 + g
14
+
g
\newline
(B)
g
−
14
g - 14
g
−
14
\newline
(C)
14
14
14
\newline
(D)
14
−
g
14 - g
14
−
g
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There are
12
12
12
more kids than adults on the ferris wheel. There are
a
a
a
adults on the ferris wheel. Choose the expression that shows the number of kids on the ferris wheel.
\newline
Choices:
\newline
(A)
a
−
12
a - 12
a
−
12
\newline
(B)
a
+
12
a + 12
a
+
12
\newline
(C)
12
12
12
\newline
(D)
12
−
a
12 - a
12
−
a
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Tammy has already read
b
b
b
of the
6
6
6
books in the PY Dragons series. Choose the expression that shows how many books Tammy has left to read.
\newline
Choices:
\newline
(A)
6
−
b
6 - b
6
−
b
\newline
(B)
6
+
b
6 + b
6
+
b
\newline
(C)
b
b
b
\newline
(D)
b
−
6
b - 6
b
−
6
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Shannon planted
t
t
t
fewer trees than Toby. Toby planted
6
6
6
trees. Choose the expression that shows how many trees Shannon planted.
\newline
Choices:
\newline
(A)
6
6
6
\newline
(B)
6
+
t
6 + t
6
+
t
\newline
(C)
6
−
t
6 - t
6
−
t
\newline
(D)
t
−
6
t - 6
t
−
6
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Lara is
3
3
3
inches shorter than Eli. Eli is
i
i
i
inches tall. Choose the expression that shows how many inches tall Lara is.
\newline
Choices:
\newline
(A)
i
+
3
i + 3
i
+
3
\newline
(B)
i
i
i
\newline
(C)
3
−
i
3 - i
3
−
i
\newline
(D)
i
−
3
i - 3
i
−
3
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Ramon has
6
6
6
whole oranges. He cut each whole into halves. Ramon gave away
2
2
2
halves. Which fraction shows the pieces Ramon gave away?
\newline
(A)
1
2
\frac{1}{2}
2
1
\newline
(B)
2
2
\frac{2}{2}
2
2
\newline
(C)
2
6
\frac{2}{6}
6
2
\newline
(D)
12
2
\frac{12}{2}
2
12
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