Mathematics
Grade 7
15 min
Convert between mixed numbers and improper fractions
Convert between mixed numbers and improper fractions
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1
Introduction & Learning Objectives
Learning Objectives
Define mixed numbers and improper fractions.
Identify the whole number, numerator, and denominator in mixed numbers.
Convert any given mixed number into an equivalent improper fraction.
Convert any given improper fraction into an equivalent mixed number.
Explain the practical reasons for converting between these two forms.
Perform conversions accurately and efficiently, simplifying when necessary.
Ever tried to share 7 pizzas equally among 3 friends? 🍕 How would you describe how much each person gets? Sometimes, numbers can be written in different ways to make them easier to understand or use!
In this lesson, you'll learn how to switch back and forth between mixed numbers and improper fractions. This skill is super important for solving more comple...
2
Key Concepts & Vocabulary
TermDefinitionExample
FractionA number that represents a part of a whole. It is written as a ratio of two integers, with a numerator (top number) and a denominator (bottom number).`rac{3}{4}` (three out of four equal parts)
NumeratorThe top number in a fraction, which indicates how many parts of the whole are being considered or taken.In `rac{5}{8}`, the numerator is 5.
DenominatorThe bottom number in a fraction, which indicates the total number of equal parts that make up the whole.In `rac{5}{8}`, the denominator is 8.
Mixed NumberA number that combines a whole number and a proper fraction. It represents a value greater than one.`2 rac{1}{3}` (two whole units and one-third of another unit)
Improper FractionA fraction where the numerator is greater than or equal to the denominator. It...
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Core Formulas
Converting a Mixed Number to an Improper Fraction
`A rac{B}{C} = rac{(A imes C) + B}{C}`
To convert a mixed number to an improper fraction, multiply the whole number (A) by the denominator (C), then add the numerator (B). This result becomes the new numerator, while the denominator (C) stays the same. This rule is useful when you need to perform operations like multiplication or division with mixed numbers.
Converting an Improper Fraction to a Mixed Number
`rac{N}{D} = Q rac{R}{D}` where `N = Q imes D + R`
To convert an improper fraction to a mixed number, divide the numerator (N) by the denominator (D). The quotient (Q) becomes the whole number part of the mixed number. The remainder (R) becomes the new numerator, and the original denominator (D) stays the same. This...
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Challenging
In which practical situation would converting an improper fraction to a mixed number be most useful?
A.To understand the real-world quantity, such as '2 1/2 cups' of flour instead of '5/2 cups'.
B.To make multiplying or dividing fractions easier.
C.To find a common denominator for adding or subtracting.
D.To determine if a fraction can be simplified.
Challenging
Which of the following improper fractions is NOT equivalent to the mixed number 4 2/3?
A.14/3
B.42/6
C.28/6
D.70/15
Challenging
Convert the improper fraction 157/12 into a mixed number.
A.12 1/12
B.13 5/12
C.13 1/12
D.12 13/12
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