Expressions and Properties of Numbers

The video tutorial covers writing addition and subtraction expressions, emphasizing the commutative property of addition. It explores using variables in expressions, understanding subtraction with models, and handling complex expressions with parentheses. The lesson concludes with a summary of key points.

What is the result of adding 7 and 1.5?

• 8.5

• 6.5

• 9.5

• 7.5

Which property allows you to write 7 + 1.5 as 1.5 + 7?

• Associative Property

• Distributive Property

• Commutative Property

• Identity Property

How can you express W increased by four?

• 4 - W

• W + 4

• W - 4

• 4 + W

What is a valid expression for the sum of a, b, and c?

• a + b - c

• a - b + c

• a * b * c

• a + b + c

How many different ways can you write the sum of a, b, and c using the commutative property?

• 4

• 3

• 5

• 6

What does 'three less than P' mean?

• P - 3

• 3 - P

• P + 3

• 3 + P

How do you express the difference of three and P?

• 3 + P

• P - 3

• 3 - P

• P + 3

What is the correct expression for 'four less than the sum of G and 5'?

• G + 5 - 4

• 4 - (G + 5)

• (G + 5) - 4

• G - 5 + 4

Why are parentheses used in the expression 'four less than the sum of G and 5'?

• To remove numbers

• To change the order of operations

• To add more numbers

• To make it look complex

In the expression 'four less than the sum of G and 5', which operation is performed first?

• Multiplication

• Division

• Addition

• Subtraction