Topic 2
Name
Vocabulary Cards
addends
Numbers added together
to give a sum.
addends
Example: 7 1 5 5 12
addend
addend
sum
The answer when adding
two or more addends.
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sum
Example: 7 1 5 5 12
Commutative
(Order) Property
of Addition
sum
Commutative
(Order) Property
of Addition
Numbers can be added in
any order and the sum will
be the same.
Example: 5 1 3 5 3 1 5
Topic 2 1 of 3
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Name
Associative
(Grouping) Property
of Addition
Associative
(Grouping) Property
of Addition
Numbers can be grouped
in any way and the sum
will be the same.
Example: (3 1 2) 1 4 3 1 (2 1 4)
31659
Identity (Zero)
Property of Addition
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Identity (Zero)
Property of Addition
5 1 4 5 9
The sum of zero and any
number is that number.
Example: 0 1 4 5 4
difference
The answer when
subtracting two numbers.
difference
Example: 7 2 2 5 5
Topic 2 2 of 3
difference
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Name
fact family
fact family
A group of related facts
using the same numbers.
estimate
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estimate
To give a number or
answer that tells about
how many or how much.
compatible
numbers
compatible
numbers
Numbers that are easy to add,
subtract, multiply, or divide
mentally.
Topic 2 3 of 3
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