Mariah's Debt and Bird's Movement

This video tutorial covers Grade 7 Common Core Math, focusing on the addition and subtraction of rational numbers. It includes two problem-solving examples: one involving a bird diving from a tree and another about Mariah repaying her grandfather. Both problems are solved using number lines and equations, demonstrating how to represent and solve real-world scenarios involving rational numbers.

What is the main focus of this lesson?

• Geometry and shapes

• Multiplication of fractions

• Division of whole numbers

• Addition and subtraction of rational numbers

How is the bird's initial position represented on the number line?

• At 9 1/2

• At 0

• At 6

• At 15 1/2

What is the bird's new position after diving down 6 feet?

• 0 feet

• 6 feet

• 9 1/2 feet

• 15 1/2 feet

What is the equation used to find the bird's new position?

• 15 1/2 + 6

• 15 1/2 - 9 1/2

• 15 1/2 - 6

• 15 1/2 + 9 1/2

How is the bird's movement represented on the number line?

• Moving up by 6

• Moving to 0

• Moving down by 6

• Staying at 15 1/2

What was Mariah's initial debt to her grandfather?

• $3.00

• $1.50

• $2.25

• $0.75

What does Mariah's initial debt represent on the number line?

• A negative value

• A fraction

• A positive value

• Zero

How much did Mariah pay back to her grandfather?

• $0.75

• $1.50

• $2.25

• $3.00

What is the final amount Mariah owes her grandfather?

• $0.75

• $1.00

• $1.50

• $1.25

What is the equation used to calculate Mariah's remaining debt?

• -2.25 + 1.50

• 2.25 - 1.50

• -2.25 - 1.50

• 2.25 + 1.50