Vocabulay
A way of doing math in my head
What is the identity property
508 + 426
What is 934
2,503 + 2,899
What is 5,402
Estimate. Round each addend to the indicated place value
34 + 23; tens
What is
30 + 20 =50
A number close to its actual value
What is an estimate
2 + (4+3) = 9
(2+4) + 3 = 9
is an example of what property
What is the associative property
123 + 390
What is 513
8,285 + 1,456
What is 9,741
Estimate. Round each addend to its indicated place value
687 + 231; hundreds
what is
700 + 200 = 900
When an answer makes sense it is
What is reasonable
7 + 3 =10
3 + 7 =10
is an example of what property
What is the commutative property
641 + 187
What is 828
5,555 + 3,555
What is 9,110
Estimate. Round each addend to its greatest place value
35 + 42
What is
40 + 40 = 80
Tells you which operations to group in a number sentence
What are parentheses
This property states that you can change the order of the addends and still get the same sum
What is the commutative property
754 + 111
What is 865
1,734 + 2,882
What is 4,616
Estimate. Round each addend to its greatest place value
216 + 536
What is
200 + 500 = 700
To use place value to exchange equal amounts when renaming a number is to
What is regroup
This property states when you add zero to any number, the sum is that number
What is the identity property
100 more than 375
What is 475
3,075 + 5,640
What is 8,715
Estimate. Round each addend to the nearest ten and nearest hundred.
133 + 560
What is
130 + 560 =690
100 + 600 = 700