Addition Properties
Which addition property is this:
5+3 = 3+5
Commutative (Flip-Flop)
Estimate. Round to the nearest 10, then add:
28 + 31 =
60
$152+$223=
$375
62+12=
74
DJ bought seven smencils. Alysse bought 3. How many did they have altogether?
7+3=10 smencils
Which addition property is this:
3 + ( 4 + 2 ) = ( 3 + 4 ) + 2
Associative Property (Buddy)
29 + 21 =
50
$1,312 + $566 =
$1,878
250+250=
500
JB brought in 8 spiders. Kemper brought in 12 snakes. Drew brought in 3 mice. How many animals were there in all?
12+8+3= 23 animals
Which addition property is this:
2 + 0 = 2
Identity Property (+0)
Estimate. Round to the nearest hundred, then add:
267 + 123 =
400
77+7=
84
43+27=
70
Paige read 67 pages from her book. Blaire read 66 pages. How many pages did they read in all?
67+66=133 pages
Give me an example of commutative property -- it HAS to be written down on your white board
answers vary
Estimate. Round to the nearest hundred, then add:
679 + 521 =
1,200
327+155=
482
125+50=
175
Aedan brought in $7.53 for the book fair. Big J brought in $3.97. How much money did they have in all?
$7.53 + 3.97 = $11.50
Which property is this:
a + 0 = a
Identity Property
Estimate. Round to the nearest ten, then add:
234 + 167 =
230+170=400
$2,934+$234=
$3,168
28+71
99
Miss McCallister's class ordered 7 pizzas! Each pizza had 10 slices. How many slices of pizza did the class have in all?
7x10= 70 pieces
10+10+10+10+10+10+10= 70