Vocabulary
An ordered set of numbers or objects in which the order helps you predict what comes next.
A. addition
B. estimation
C. patter
C. pattern
Is 450 even or odd?
even
54 + 4 =
58
Round to the nearest ten:
65
70
Which property states that when you add zero to any number, the sum is that number?
Identity Property
Is 931 even or odd?
odd
209 + 103 =
312
Round to the nearest hundred:
621
600
Which property states that you can add numbers in any order and the sum will remain the same?
Commutative Property
Is the sum of 9 and 6 even or odd?
odd
56 + 21 + 11 =
88
Round to the nearest ten:
349
350
What is the answer to an addition problem called?
The sum
True or false: The sum of two even numbers is always even.
True
328 + 127 =
455
Estimate: 43 + 29 =
70
True or False: To find an estimation you should first add and then round your answer.
False
True or False: The sum of one odd and one even number is always even.
False
545 + 139 =
684
Estimate: 398 + 212 =
600