Vocabulary Cards
Topic 2 Set A
Words
Vocabulary Cards Topic 2
Set A Words
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Name
Breaking Apart
Compensation
Lesson 2–1
Lesson 2–1
Counting On
Associative
Property of Addition
Lesson 2–1
Lesson 2–1
Commutative
Property of Addition
Identity Property
of Addition
Lesson 2–1
Lesson 2–1
Instead of making 2-sided copies of this Words page and the Definitions page, you can copy the
Definitions page, cut out the cards, and have students write the words on the other side of the cards.
Topic 2
19
Vocabulary Cards
Topic 2 Set A
Definitions
Compensation
Breaking Apart
Adding and subtracting
the same number to make
the sum or difference
easier to find.
Mental math method used
to rewrite a number as the
sum of numbers to form
an easier problem.
Associative Property
of Addition
Counting On
Addends can be
regrouped and the sum
remains the same.
Identity Property of Addition
The sum of any number
and zero is that number.
20
Topic 2
Counting up from the
smaller number to find the
difference of two numbers.
Commutative Property
of Addition
Numbers can be added
in any order and the sum
remains the same.
© Pearson Education, Inc. 4
Vocabulary Cards Topic 2
Set A Definitions
Name
Name
Vocabulary Cards
Topic 2 Set B
Words
Vocabulary Cards Topic 2
Set B Words
Inverse Operations
© Pearson Education, Inc. 4
Lesson 2–5
Instead of making 2-sided copies of this Words page and the Definitions page, you can copy the
Definitions page, cut out the cards, and have students write the words on the other side of the cards.
Topic 2
21
Vocabulary Cards
Topic 2 Set B
Definitions
Vocabulary Cards Topic 2
Set B Definitions
Name
Inverse Operations
© Pearson Education, Inc. 4
Two operations that undo
each other. Addition and
subtraction are inverse
operations. Multiplication
and division are
inverse operations.
22
Topic 2