Adding and Subtracting Fractions with Unlike Denominators

The video tutorial introduces the four square method for adding and subtracting fractions. It begins with an example of adding two-thirds and three-fourths, demonstrating how to find the least common multiple (LCM) and create equivalent fractions. The tutorial then outlines the steps of the four square method, emphasizing organization. Finally, it provides a subtraction example with fractions having unlike denominators, illustrating the process of finding a common denominator and simplifying the result.

What is the first step in the four square method for handling fractions?

• Drawing a big T to create four squares

• Adding the numerators directly

• Finding the greatest common divisor

• Multiplying the fractions

Tags

CCSS.7.NS.A.1C

How do you find the least common multiple of two denominators?

• By subtracting them

• By dividing them

• By adding them

• By skip counting until a common number is found

What do you do after finding the LCM in the four square method?

• Convert to mixed numbers

• Simplify the fractions

• Find equivalent fractions with the LCM as the denominator

• Add the fractions directly

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What step follows finding the LCM in the process of adding or subtracting fractions?

• Creating equivalent fractions with the new denominator

• Simplifying the fractions

• Directly adding or subtracting the fractions

• Converting fractions to decimals

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

How is an improper fraction converted to a mixed number?

• By adding the numerator to the denominator

• By dividing the numerator by the denominator

• By multiplying the numerator by the denominator

• By subtracting the denominator from the numerator

In the four square method, what is done in the last box if you have an improper fraction?

• It is converted into a mixed number

• It is converted into a decimal

• It is left as is

• It is simplified further

What is the purpose of the four square method?

• To graph linear equations

• To simplify complex algebraic expressions

• To solve quadratic equations

• To organize the steps of adding and subtracting fractions

Tags

CCSS.HSA-REI.B.4B

What is the common denominator found for the fractions 4/5 and 1/2?

• 2

• 20

• 5

• 10

How do you create equivalent fractions?

• By multiplying both the numerator and denominator by the same number

• By adding the same number to both numerator and denominator

• By subtracting the same number from both numerator and denominator

• By dividing both the numerator and denominator by the same number

Tags

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the result of subtracting 1/2 from 4/5 using the four square method?

• 3/10

• 3/5

• 2/5

• 1/10

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2