Addition Properties
3 + 0
identity
283 + 24
307
29 + 29 + 90
148
39 + 28
40 + 30 = 70
Emma has 15 crayons at home. At school she has another p crayons. How many crayons does she have in total
15 + p or p + 15
2 + 8 + 3 = 8 + 3 + 2
Commutative
382 + 299
681
392 + 293 + 89
774
293 + 937
300 + 900 = 1,200
There are N students in the gym and 20 in the classroom.
Write an expression to show how many students there are in all.
20 + N or N + 20
3 (9+ 2) = 2 + (3+9)
Associative
9,278 + 83, 283
92,561
1,283 + 5,999 + 22,382
29,664
3,923 + 92,383
4,000 + 92,000 = 96,000
There are 12 cheese pizzas and 8 pepperoni pizzas at a party.
Some more pizzas, represented by K, are delivered later.
Write an expression to show the total number of pizzas.
12 + 8 + K or 20 + K
3 + 7 + 9 + 2 = 9 + 7 + 2 + 3
Commutative
9,723,354 + 27,372,028
37,095,382
13,281,394 + 193,283,281 + 1,281,382
207,846,057
921,384 + 329,394
900,000 + 300,000 = 1,200,000
r + 14 when r = 82
96
(6+0) + 4= 6 + (0+4)
Identity and Associative
281,304,555 + 382,374,283
663,678,838
298,823,183 +281,382,381 + 281,382,381
861,587,945
93,281,383 + 199,283,281
90,000,000 + 200,000,000 = 290,000,000
184