Fraction Operations and Simplification

In this lesson, Miss Janky covers addition and subtraction of fractions using LCM and GCF. The video includes step-by-step examples of adding fractions, subtracting mixed numbers, and solving a real-life word problem. Critical thinking is encouraged by exploring how LCM and GCF can be applied in various fraction operations.

What is the first step in adding fractions with different denominators?

• Add the numerators directly

• Find a common denominator using LCM

• Subtract the smaller fraction from the larger one

• Multiply the denominators

How do you determine the number to multiply the numerator by when finding a common denominator?

• Add the two denominators

• Divide the larger denominator by the smaller one

• Multiply both denominators together

• Use the same number used to multiply the denominator

What is the result of adding 9/24 and 5/24?

• 1/2

• 14/24

• 19/24

• 7/12

What is the purpose of simplifying a fraction?

• To make the fraction larger

• To change the fraction to a mixed number

• To find a common denominator

• To express the fraction in its simplest form

In the mixed number example, what is the common denominator used?

• 18

• 45

• 90

• 10

How do you handle the whole number in a mixed number subtraction problem?

• Ignore it

• Add it to the numerator

• Keep it unchanged

• Subtract it from the other whole number

What fraction of the band is woodwind if two-fifths are brass and one-third are strings?

• 1/3

• 2/5

• 3/15

• 1/15

What operation is used to find the fraction of woodwind instruments in the band?

• Subtraction

• Multiplication

• Addition

• Division

What is the least common multiple of 5 and 3?

• 3

• 5

• 15

• 30

What is the final simplified form of 38/90?

• 38/90

• 19/90

• 38/45

• 19/45