Addition properties
What addition property is shown?
13+2=2+13
commutative
201-101 rounded to the nearest hundreds place
100
459-148
311
Estimate 100 to the nearest hundreds place
100
What is the inverse operation of addition?
Subtraction
What addition property is shown?
18+0=18
Identity property
345+506 rounded to the nearest hundreds
800
521+429
950
Round 321 to the nearest hundreds place
300
Show the inverse operation
5+2=7
7-2=5
or
7-5=2
What addition property is shown?
8+(12+14)= 34
Associative property
564+221 rounded to the nearest tens
780
353-107
246
Round 51 to the nearest tens place
50
Solve and check using inverse operation
27-12
27-12=15
15+12=27
What is the missing number?
13+__= 13
0
789-371 Rounded to the nearest tens
420
Use expanded form to solve
351+413
300+50+1
400+10+3
700+60+4=764
Round 150 to the nearest hundreds place
200
Solve and check using the inverse operation
334+221
334+221=555
555-221=334
What is the missing number?
(24+13)+48= ___+48
37
455+555 rounded to the nearest tens place
1020
Michael wants to subtract 451 – 98 mentally. First Michael adds 2 to 98 to get 100.
What should Sabina’s next step be?
add 2 to 451
round 26,597 to the nearest hundreds place
26,600
Solve and check using the inverse operation
482-327
482-327=155
155+327=482