Resources
Testimonials
Plans
Sign in
Sign up
Resources
Testimonials
Plans
Home
Math Problems
Grade 8
Add and subtract rational numbers: word problems
There are
3
3
3
pounds of Hay Day pig food left in Evan's pantry. A serving for his pet pig, Fluffy, is
5
8
\frac{5}{8}
8
5
of a pound. How many servings are left? Use the model to help answer the question. Write your answer as a whole number, proper fraction, or mixed number.
\newline
____ servings
Get tutor help
There was a strong thunderstorm yesterday. Paul heard that it rained
1.3
1.3
1.3
inches, and Janet heard that it rained
1
2
5
1\frac{2}{5}
1
5
2
inches.
\newline
Who heard that it rained less?
\newline
Choices:
\newline
(A)Paul
\newline
(B)Janet
Get tutor help
David bought
3
3
3
ounces of chocolate.
0.4
0.4
0.4
ounces of it was milk chocolate and the rest was dark chocolate. How much dark chocolate did David buy?
\newline
_____ ounces
Get tutor help
Eliana mixed
4.1
4.1
4.1
grams of salt into a pot of soup she was cooking. Before she served the soup, Eliana added
0.7
0.7
0.7
grams of salt. How much salt did Eliana put into the soup in all?
\newline
\newline
_
_
_
_
\_\_\_\_
____
grams
Get tutor help
A meteorologist recorded the rainfall in Lakewood in two consecutive months. In the first month, there was
1
2
\frac{1}{2}
2
1
of an inch of rain. In the second month, there was
1
6
\frac{1}{6}
6
1
of an inch of rain. What was the total amount of rainfall during the two months?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_____ inches
Get tutor help
Lara ran
1
2
\frac{1}{2}
2
1
of a mile on Saturday and
9
10
\frac{9}{10}
10
9
of a mile on Sunday. How many miles did Lara run in all?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_____ miles
Get tutor help
Kirk's chemistry textbook weighs
3
4
\frac{3}{4}
4
3
of a pound and his geometry textbook weighs
1
2
\frac{1}{2}
2
1
of a pound. How much more does the chemistry textbook weigh than the geometry textbook?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_____ pounds
Get tutor help
When Carly looked at her cell phone bill for the month, she saw that she had spent
3
4
\frac{3}{4}
4
3
of her minutes talking to her mother and
1
8
\frac{1}{8}
8
1
of her minutes talking to her best friend. What fraction of the minutes did Carly spend talking to either her mom or her best friend?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_
_
_
_
_
\_\_\_\_\_
_____
of the minutes
Get tutor help
Greta has been monitoring her mileage. According to last week's driving log, she drove
1
5
\frac{1}{5}
5
1
of a mile in her car and
1
10
\frac{1}{10}
10
1
of a mile in her truck. How far did Greta drive last week in all?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_____ miles
Get tutor help
Of the houses in Erica's neighborhood,
1
5
\frac{1}{5}
5
1
are blue and another
3
10
\frac{3}{10}
10
3
are yellow. What fraction of the houses are either blue or yellow?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_____ of the houses
Get tutor help
At Norma's Vacation Wear,
3
10
\frac{3}{10}
10
3
of the garments are bikinis and
2
5
\frac{2}{5}
5
2
are trunks. What fraction of the garments are either bikinis or trunks?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_____ of the garments
Get tutor help
Anita and her roommates ate
5
6
\frac{5}{6}
6
5
of a pint of ice cream on Friday night and
2
3
\frac{2}{3}
3
2
of a pint of ice cream on Saturday night. How many pints did they eat in all?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_____ pints
Get tutor help
Carrie sprinted
2
3
\frac{2}{3}
3
2
of a lap and then took a break by jogging
1
6
\frac{1}{6}
6
1
of a lap. How much farther did Carrie sprint than jog?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_
_
_
_
\_\_\_\_
____
laps
Get tutor help
At the Sullivan Ski Resort, it snowed
4
5
\frac{4}{5}
5
4
of a foot yesterday and
7
10
\frac{7}{10}
10
7
of a foot today. How much more did it snow yesterday than today?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_
_
_
\_\_\_
___
feet
Get tutor help
Danielle had
0.2
0.2
0.2
grams of pepper. Then she used
0.1
0.1
0.1
grams of the pepper to make some scrambled eggs. How much pepper does Danielle have left?
\newline
Choices:
\newline
(A)
0.1
0.1
0.1
grams
\newline
(B)
0.5
0.5
0.5
grams
\newline
(C)
0.2
0.2
0.2
grams
\newline
(D)
0.3
0.3
0.3
grams
Get tutor help
A supermarket found that
1
6
\frac{1}{6}
6
1
of customers bought produce and
1
2
\frac{1}{2}
2
1
of customers bought processed food. Which purchase was made by a greater fraction of customers?
\newline
Choices:
\newline
(A) produce
\newline
(B) processed food
Get tutor help
Martin's Diner served
3
10
\frac{3}{10}
10
3
of its meals within half an hour. Super Grillers served
4
5
\frac{4}{5}
5
4
of its meals within half an hour. Which restaurant served a greater fraction of meals within half an hour?
\newline
Choices:
\newline
(A) Martin's Diner
\newline
(B) Super Grillers
Get tutor help
A restaurant ordered
9.3
9.3
9.3
pounds of pasta. The next night, the restaurant used
5.3
5.3
5.3
pounds of it. How much pasta is left?
\newline
_
_
_
_
\_\_\_\_
____
pounds
Get tutor help
On a hot day, Edna poured
7
8
\frac{7}{8}
8
7
of a bucket of water into a plastic wading pool. A few minutes later she added another
5
5
5
buckets. How much water did Edna pour into the pool?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_
_
_
_
\_\_\_\_
____
buckets
Get tutor help
An athlete drank
3
1
2
3\frac{1}{2}
3
2
1
bottles of sports drink in the first half of a match and another
4
4
5
4\frac{4}{5}
4
5
4
bottles in the second half. How much did he drink in all?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_
_
_
\_\_\_
___
bottles
Get tutor help
Reggie's parents keep a chart on the wall where they mark how much Reggie grows each year. When Reggie was
15
15
15
, he grew
1
1
1
inch and when he was
16
16
16
, he grew
4
5
\frac{4}{5}
5
4
of an inch. In total, how much did Reggie grow in during those two years?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_
_
_
_
\_\_\_\_
____
inches
Get tutor help
Jane watched a beetle on the sidewalk. It crawled
1
2
\frac{1}{2}
2
1
of a yard, then rested for a bit, and then crawled
1
5
\frac{1}{5}
5
1
of a yard farther. How far did the beetle crawl in all?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_
_
_
\_\_\_
___
yards
Get tutor help
Brennan owns two dogs. Each day, one dog eats
5
6
\frac{5}{6}
6
5
of a scoop of dog food and the other dog eats
2
3
\frac{2}{3}
3
2
of a scoop. Together, how much dog food do the two dogs eat each day?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_
_
_
_
\_\_\_\_
____
scoops
Get tutor help
Bernie rode his bicycle
1
5
\frac{1}{5}
5
1
of a mile from his house to the park. Then he rode
7
10
\frac{7}{10}
10
7
of a mile from the park to the library. How many miles did Bernie ride in all?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_
_
_
_
\_\_\_\_
____
miles
Get tutor help
Tess is
3
3
3
inches shorter than Johnny. Johnny is
i
i
i
inches tall. Write an expression that shows how many inches tall Tess is.
Get tutor help
Fred takes a piece of wood that is
1
2
\frac{1}{2}
2
1
of an inch thick and glues it to a piece of wood that is
5
6
\frac{5}{6}
6
5
of an inch thick. Together, what is the thickness of the two pieces of wood?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_
_
_
\_\_\_
___
inches
Get tutor help
Cassie filled a bucket with
3
3
3
gallons of water. Later, she poured out
1
2
\frac{1}{2}
2
1
of a gallon of the water. How much water is left in the bucket?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_____ gallons
Get tutor help
Darell bought
7.3
7.3
7.3
pounds of peanuts and
0.1
0.1
0.1
pounds of raisins. How many pounds of snacks did he buy in all?
\newline
\newline
_
_
_
_
\_\_\_\_
____
pounds
Get tutor help
As part of a lesson on earthquakes, a science class is researching the movement of a nearby fault line. The fault line moved
2
3
5
2\frac{3}{5}
2
5
3
inches during the past year and
1
1
10
1\frac{1}{10}
1
10
1
inches the year before. How far did the fault line move in all?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_____ inches
Get tutor help
Charlotte bought
6.4
6.4
6.4
pounds of potatoes and
0.4
0.4
0.4
pounds of carrots. How many pounds of vegetables did she buy in all?
\newline
\newline
_
_
_
_
\_\_\_\_
____
pounds
Get tutor help
Elena has been monitoring her mileage. According to last week's driving log, she drove
2
5
\frac{2}{5}
5
2
of a mile in her car and
1
2
\frac{1}{2}
2
1
of a mile in her truck. How far did Elena drive last week in all?
\newline
Write your answer as a fraction or as a whole or mixed number.
\newline
_____ miles
Get tutor help
Harold's pet cat weighed
7.9
7.9
7.9
pounds. Then the cat gained
0.9
0.9
0.9
pounds. How much does the cat weigh now?
\newline
\newline
_
_
_
_
\_\_\_\_
____
pounds
Get tutor help
Jon ate
1
3
\frac{1}{3}
3
1
of a pizza, and then ate another
1
2
\frac{1}{2}
2
1
of a pizza. What fraction of a pizza did Jon eat all together?
Get tutor help
Today I am
6
6
6
years less than half my father's age
6
6
6
years, I will be
6
6
6
years more than one-third my father's age. How old was my father when I was born?
Get tutor help
Travis read
1
2
\frac{1}{2}
2
1
of his book on Sunday and
1
8
\frac{1}{8}
8
1
of his book on Monday. How much of his book has he read in all?
\newline
Give your answer in simplest form.
Get tutor help
