Addition
Subtraction
Properties of Addition
Vocabulary
100

This is the sum of the expression 2.25 + 8.55. 

What is 10.8?

100

This is the difference of the expression 8.7 - 4.22. 

What is 4.48?

100

This property is shown with the addition expression 

5 + 2 + 1 = 2 + 1 + 5.

What is the Commutative Property. 

100

This is the answer to an addition problem.

What is the sum?

200

This is the sum of the expression -7.51 + -10.

What is -17.51?

200

This is the difference of the expression 

10.3 - (-11.1).

What is 21.4?

200

This property is shown with the addition expression (4.5 + 3) + 0 = 4.5 + 3.

What is the identity property?

200

This is the answer to a subtraction problem?

What is the difference?

300

This is the sum of the expression -9.88 + 11.5. 

What is 1.62?

300

This is the work that you do while you perform the squiggle step.

What is Keep Change Change?

300

This property is shown with the addition expression 

(8.6 + 9.13) + 2 + 4.5 = 8.6 + 9.13 + (2 + 4.5).

What is the Associative Property? 

300

This is the word used to describe the distance a number is away from 0.

What is the Absolute Value?

400

When the addends of an addition problem have opposite signs, you must do what with their absolute values to solve?

What is subtract?

400

During the squiggle step, this is what you do to the sign of the first number in the expression.

What is keep the sign? 

400

The definition of this property states that for any three or more numbers, their sum is always the same, regardless of their grouping.

What is the Associative Property?

400

The word opposites means this following vocabulary word too.

What is additive inverses?

500

This step in solving decimal problems is not needed for an addition problem, since addition is a form that we like.

What is the squiggle step?

500

You are becoming less negative, or _____________, when you are subtracting a negative number.

What is positive?

500

The definition of this property states that two or more numbers can be added in any order without changing the sum.

What is the Commutative Property? 

500

Additive inverses add to this number.

What is 0?