Vocabulary
Numbers added together to give a sum.
Addend
To give a number or answer that tells about how many or how much.
Estimate
Numbers can be grouped in any way and the sum will be the same
Associative Property
What is this number rounded to the nearest 100: 674?
700
The answer when adding two or more addends.
Sum
What property does this show: 5 + 0 = 5?
Identity Property
The sum of zero and any number is that number.
Identity Property
What is this number rounded to the nearest 10: 742?
740
To replace a number with another number that tells about how many or how much.
Round
A group of related facts using the same numbers.
Fact Family
Numbers can be added in any order and the sum will be the same.
Commutative Property
What is this number rounded to the nearest 10: 496?
500
Numbers that are easy to add, subtract, multiply or divide mentally.
Compatible Numbers
What property does this show: (8 + 2) + 1 = 8 + (2 + 1)?
Associative Property
The rule states that when you are adding two or more numbers, you can add the numbers in any order and still get the same result.
Distributive Property
What is this number rounded to the nearest 1,000: 3, 122?
3,000
A number sentence that uses an equal sign (=) to show that the value to its left is the same as the value to its right.
Equation
What property does this show: 5 + 3 = 3 + 5?
Commutative Property
Give an example of any of the properties on the whiteboard and name it.
Teachers decision.
What is this number rounded to the nearest 10: 7,235?
7,240