Algebraic Expressions and Operations

The video tutorial covers lesson 18, focusing on rewriting expressions using only addition and practicing the distributive property. It includes solving a number puzzle and correcting an error in an expression. The teacher provides step-by-step guidance and examples to help students understand the concepts.

What is the rule used to convert subtraction into addition?

• Multiply by zero

• Subtract the opposite

• Add the same number

• Add the opposite

How would you rewrite the expression '4x - 7y' using only addition?

• 4x + 7

• 4x - (-7y)

• 4x + 7y

• 4x + (-7y)

What is the first step in applying the distributive property to '9(4x - 3y)'?

• Add 9 to each term

• Multiply 9 by each term inside the parentheses

• Subtract 9 from each term

• Divide each term by 9

If you have '9 times 2/3', what is the result?

• 12

• 3

• 6

• 9

What is the simplified form of 'negative two times negative six x'?

• -12x

• 12x

• -6x

• 6x

How do you simplify '1/5 of 20y'?

• 4y

• 5y

• 20y

• 1y

What mistake did Kieran make in his expression for the number puzzle?

• He used division instead of multiplication

• He forgot to multiply the entire expression by 5

• He used the wrong numbers

• He added instead of subtracting

What is the correct expression for Kieran's number puzzle?

• x - 10

• 5x - 10

• x + 10

• 5x + 10

If x = 10, what is the result of Kieran's corrected expression?

• 50

• 40

• 10

• 0

What is the result of multiplying 5 by (x - 2)?

• 5x - 10

• 5x + 10

• x + 10

• x - 10