Addition and Subtraction Patterns
100 more than 985,672
985,772
Rounded to the hundreds: 5,238 + 3,420
5,200 + 3,400 = 8,600
State which property: (9+8)+7 = 9+(8+7)
Associative Property
118,577 + 254,009
372,586
212,894 - 198,284
14,610
1,000 less than 25,259
24,259
Rounded to the ten thousands: 25,497 + 54,088
30,000 + 50,000 = 80,000
Commutative
359,751 + 486,258
846,009
489,255 - 281,816
207,439
1,000 more than 37,542
38,542
Rounded to the thousands: 27,629 - 5,364
28,000 - 5,000 = 23,000
Which property? 37-0=37
Subtraction Rules
888,888 + 102,222
991,110
258,914 - 168,876
90,038
10 less than 2,727
2,717
Rounded to the hundreds: 2,647 - 256
2,600 - 300 = 2,300
Which property: 17+(11+18) = (17+11)+18
Associative Property
328,805 + 646,464
975,269
545,248 - 359,249
185,999
10,000 more than 6,310
16,310
Round to the nearest hundred: 14,497 - 8,749
14,500 - 8,700 = 5,800
Which property: 96+13=13+96
Commutative Property
335,533 + 254,009
589,542
605,060 - 488,777
116,283