In this worksheet, we will practice using mental strategies including applying the commutative and associative properties to add three or more decimal numbers with up to two decimal places.

Q1:

Which of the following equations shows the commutative property of addition?

• A
• B
• C
• D
• E

Q2:

Which of the following equations shows the associative property of addition?

• A
• B
• C
• D
• E

Q3:

Evaluate using the associative property.

Q4:

Complete the following: .

• A8.01, 10.12
• B8, 12.12
• C8, 11.12
• D7, 10.12
• E7, 11.12

Q5:

Use the associative property to solve .

Q6:

Does the equation describe the associative or the commutative property?

• AThe commutative property
• BThe associative property

What is the result of ?

Q7:

Does the equation describe an associative or a commutative property?

• AA commutative property
• BAn associative property

What is the result of ?

Q8:

Look at the picture. Which of the following is true?

• AOnly Farida is correct.
• BOnly Karim is correct.
• CBoth Karim and Farida are correct.
• DNeither of them is correct.

What is the result of ?

Q9:

Are the expressions on the cards equal? • AYes
• BNo

What is ?

Q10:

Are the expressions on the cards equal? • ANo
• BYes

What is ?