Exploring LT #1 Notes on Rational Expressions

The video tutorial covers adding and subtracting fractions, emphasizing the importance of common denominators. It explains how to find common denominators and uses models to visualize the process. The tutorial also addresses mixed numbers, converting them to improper fractions, and demonstrates subtraction of fractions. The instructor provides examples and encourages viewers to practice problems.

Why do we need common denominators to add fractions like 1/2 and 1/3?

• To accurately combine fractions

• To simplify the fractions

• To make the fractions larger

• To convert fractions to decimals

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the common denominator for 1/2 and 1/3?

• 2

• 3

• 6

• 5

How many sixths make up one half?

• 2 sixths

• 3 sixths

• 4 sixths

• 6 sixths

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

What fraction results from adding 1/2 and 1/3 when using a common denominator?

• 2/5

• 4/6

• 3/5

• 5/6

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

When adding mixed numbers, what is the first step?

• Convert to improper fractions

• Find a common denominator

• Multiply the denominators

• Add the whole numbers

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the result of adding 3 and 1/5 to 1 and 2/5?

• 4

• 5

• 4 and 3/5

• 4 and 3/10

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

How do you handle subtraction of mixed numbers with different denominators?

• Ignore the fractions

• Subtract directly

• Find a common denominator first

• Convert to decimals

Tags

CCSS.7.NS.A.1C

What is the simplified form of 22/24?

• 11/12

• 11/24

• 1/2

• 2/3

What technique can be used to avoid negative results in subtraction of fractions?

• Ignoring the signs

• Using a calculator

• Borrowing from the whole number

• Multiplication

Tags

CCSS.7.NS.A.1C

What is the result of 5 1/8 minus 2 5/24 using borrowing?

• 2 11/12

• 3 11/12

• 3 1/8

• 3 3/24

Tags

CCSS.7.NS.A.1C