Addition Properties
Find the sum. Identify the addition property.
(4+3)+6=?
4+(3+6)=?
13
Associative Property
Estimate to the nearest HUNDRED. Round each addend to its greatest place value.
349+252=?
600
Estimate to the nearest HUNDRED. Round each addend to its greatest place value.
1,321+2,112=?
3,400
Find each sum.
256+183=?
439
Find each sum.
1,905+4,590=?
6,495
Find the sum. Identify the addition property.
12+0=?
12; Identity Property
Estimate to the nearest HUNDRED. Round each addend to its greatest place value.
412+187=?
600
Estimate to the nearest HUNDRED. Round each addend to its greatest place value.
2,210+3,211=?
5,400
Find each sum.
531+142=?
673
Find each sum.
2,367+6,930=?
9,297
Find the missing number. Identify the addition property.
13+14=?+13
14
Communicative Property
Estimate to the nearest HUNDRED. Round each addend to its greatest place value.
284+146=?
400
Estimate to the nearest HUNDRED. Round each addend to its greatest place value.
4,191+1,710=?
5,900
Find each sum.
742+125=?
867
Find each sum.
1,059+2,592=
3,651
Find the sum. Identify the addition property.
1,213+0=?
1,213
Identity Property
Estimate to the nearest HUNDRED. Round each addend to its greatest place value.
509+399=?
900
Estimate to the nearest HUNDRED. Round each addend to its greatest place value.
3,380+2,439=?
5,800
Find each sum.
824+942=?
1,766
Find each sum.
3,957+1,947= ?
5,904
Find the sum. Identify the addition property.
343+ (7+12)=?
(343+7)+12=?
BONUS: Which grouping (the first or the second) makes the most sense mathematically?
362
Associative Property
The second, because 342 and 7 makes an easy number that is easy to add in your head.
Estimate to the nearest HUNDRED. Round each addend to its greatest place value.
772+334=?
1,100
Estimate to the nearest HUNDRED. Round each addend to its greatest place value.
7,391+8,239=?
15,600
Find each sum.
932+848=?
1,873
Find each sum.
5,383+3,783=?
9,166