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Subtract: 1 3 4 6 7 8 .

41 8

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Subtract: 10 3 7 22 4 9 .

757 63

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Key concepts

  • Add mixed numbers with a common denominator.
    1. Add the whole numbers.
    2. Add the fractions.
    3. Simplify, if possible.
  • Subtract mixed numbers with common denominators.
    1. Rewrite the problem in vertical form.
    2. Compare the two fractions.
      If the top fraction is larger than the bottom fraction, go to Step 3.
      If not, in the top mixed number, take one whole and add it to the fraction part, making a mixed number with an improper fraction.
    3. Subtract the fractions.
    4. Subtract the whole numbers.
    5. Simplify, if possible.
  • Subtract mixed numbers with common denominators as improper fractions.
    1. Rewrite the mixed numbers as improper fractions.
    2. Subtract the numerators.
    3. Write the answer as a mixed number, simplifying the fraction part, if possible.

Practice makes perfect

Model Addition of Mixed Numbers

In the following exercises, use a model to find the sum. Draw a picture to illustrate your model.

Add Mixed Numbers with a Common Denominator

In the following exercises, add.

Model Subtraction of Mixed Numbers

In the following exercises, use a model to find the difference. Draw a picture to illustrate your model.

Subtract Mixed Numbers with a Common Denominator

In the following exercises, find the difference.

19 13 15 13 7 15

6 2 5

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Add and Subtract Mixed Numbers with Different Denominators

In the following exercises, write the sum or difference as a mixed number in simplified form.

2 7 8 4 1 3

−1 11 24

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Mixed Practice

In the following exercises, perform the indicated operation and write the result as a mixed number in simplified form.

Everyday math

Sewing Renata is sewing matching shirts for her husband and son. According to the patterns she will use, she needs 2 3 8 yards of fabric for her husband’s shirt and 1 1 8 yards of fabric for her son’s shirt. How much fabric does she need to make both shirts?

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Sewing Pauline has 3 1 4 yards of fabric to make a jacket. The jacket uses 2 2 3 yards. How much fabric will she have left after making the jacket?

7 12 yards

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Printing Nishant is printing invitations on his computer. The paper is 8 1 2 inches wide, and he sets the print area to have a 1 1 2 -inch border on each side. How wide is the print area on the sheet of paper?

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Framing a picture Tessa bought a picture frame for her son’s graduation picture. The picture is 8 inches wide. The picture frame is 2 5 8 inches wide on each side. How wide will the framed picture be?

13 1 4 inches

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Writing exercises

Draw a diagram and use it to explain how to add 1 5 8 + 2 7 8 .

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Edgar will have to pay $3.75 in tolls to drive to the city.

Explain how he can make change from a $10 bill before he leaves so that he has the exact amount he needs.

How is Edgar’s situation similar to how you subtract 10 3 3 4 ?

Answers will vary.

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Add 4 5 12 + 3 7 8 twice, first by leaving them as mixed numbers and then by rewriting as improper fractions. Which method do you prefer, and why?

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Subtract 3 7 8 4 5 12 twice, first by leaving them as mixed numbers and then by rewriting as improper fractions. Which method do you prefer, and why?

Answers will vary.

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Self check

After completing the exercises, use this checklist to evaluate your mastery of the objectives of this section.

.

After reviewing this checklist, what will you do to become confident for all objectives?

Questions & Answers

What are the factors that affect demand for a commodity
Florence Reply
differentiate between demand and supply giving examples
Lambiv Reply
differentiated between demand and supply using examples
Lambiv
what is labour ?
Lambiv
how will I do?
Venny Reply
how is the graph works?I don't fully understand
Rezat Reply
information
Eliyee
devaluation
Eliyee
t
WARKISA
hi guys good evening to all
Lambiv
multiple choice question
Aster Reply
appreciation
Eliyee
explain perfect market
Lindiwe Reply
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
Ezea
What is ceteris paribus?
Shukri Reply
other things being equal
AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
yes,thank you
Shukri
Can I ask you other question?
Shukri
what is monopoly mean?
Habtamu Reply
What is different between quantity demand and demand?
Shukri Reply
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
ok
Shukri
how do you save a country economic situation when it's falling apart
Lilia Reply
what is the difference between economic growth and development
Fiker Reply
Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
Abdisa Reply
any question about economics?
Awais Reply
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
thank you so much 👍 sir
Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
Feyisa Reply
Answer
Feyisa
c
Jabir
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
Gsbwnw Reply
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
Abdureman
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Source:  OpenStax, Prealgebra. OpenStax CNX. Jul 15, 2016 Download for free at http://legacy.cnx.org/content/col11756/1.9
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