Rational Numbers Operations and Concepts

This video tutorial covers Grade 7 Math, Module 2, Lesson 9, focusing on applying properties of operations to add and subtract rational numbers. It includes detailed solutions to two problems: one involving rational numbers and another combining decimals and fractions. The lesson emphasizes using properties of numbers and finding common denominators.

What is the main focus of this lesson in Common Core Math Grade 7?

• Multiplying rational numbers

• Applying properties of operations to add and subtract rational numbers

• Solving algebraic equations

• Dividing rational numbers

In Problem 1, what operation is performed on the number 80?

• Division

• Addition

• Subtraction

• Multiplication

How can subtracting a number be rewritten using addition?

• By multiplying by zero

• By subtracting a negative number

• By adding a negative number

• By adding a positive number

What is the final answer for Problem 1 as a single rational number?

• 58 and 15/15

• 57 and 11/15

• 58 and 11/15

• 57 and 15/15

What types of numbers are combined in Problem 3?

• Decimals and fractions

• Fractions and whole numbers

• Integers and fractions

• Whole numbers and decimals

In Problem 3, what is the first step in combining fractions?

• Multiply fractions

• Add whole numbers first

• Find a common denominator

• Convert fractions to decimals

What is the final answer for Problem 3 when using fractions?

• 25 and 1/10

• 26 and 1/10

• 25 and 11/10

• 26 and 11/10

What is the decimal equivalent of the final answer in Problem 3?

• 25.1

• 26.1

• 25.11

• 26.11