Properties of Addition
Name this property of addition.
41+0=41
Identity Property of Addition
Round and estimate to the nearest ten.
487+354=
487-490
354-350
490+350=840
Use partial sums to add.
326+195=
300+100=400
20+90=110
6+5=11
400+110+11=521
Add. Regroup if needed.
139 + 404=
543
If you have an even + even number your answer will be?
Name this property of Addition.
48+96=96+48
Commutative Property of Addition.
Round and estimate using front end estimation.
275+436=
200+400=600
708+294=
700+200=900
0+90=90
8+4=12
900+90+12=1,002
Add. Regroup if needed.
438 + 776=
1,214
odd
Name this property of addition.
Changing the order of addends does not change the sum.
Commutative Property of Addition.
Round and estimate to the nearest hundred.
602+136=
602-600
136-200
600+200=800
Use partial sums to add.
364+283=
300+200=500
60+80=140
4+3=7
500+140+7=647
Add. Regroup if needed.
786+235=
1,021
If you have an odd + odd number your answer will be?
even
Name this property of addition.
The sum of 0 and a number is the same as that number.
Round and estimate to the nearest hundred.
994+218=
994-1,000
218-200
1,000+200=1,200
Use partial sums to add.
624+196=
600+100=700
20+90=110
4+6=10
700+110+10=820
Add. Regroup if needed.
409+107+109+281=
906
If you have an even + odd number your answer will be?
odd
Name this property of addition.
The way the addends are grouped does not change the sum.
Associative Property of Addition
Round and estimate to the nearest ten.
388+210=
388-390
210-210
390+210= 600
Use partial sums to add.
880+894=
800+800=1,600
80+90=170
0+4=4
1,600+170+4=1,774
Add. Regroup if needed.
236+433+158=
827
Use a bar model to solve.
The parking lot has 168 spots on the first level and the bottom level has 40 more spots than the top level. How many parking spots are there in all?
168+40=208 for bottom level and then 208+168=376 spots in all