Vocabulary
A number close to the exact number.
Estimate
Answer the Problem and Name the Property.
0+125
125
Identity Property
Round the numbers to the tens place then add them together.
78+25=
103
456
+950
1,406
Anna saved $129 in May and $132 in June. How much money altogether did she save?
261
Symbols used to show grouping.
Parenthesis
Answer the Problem and Name the Property.
8+3=_ or 3+8=_
11
Commutative Property
Round each number to the hundreds place then add.
682+242=
900
772
+343
1115
What number is 100 more than 3,678?
3,778
To rename a number using place value.
Regroup
Answer the Problem and Name the Property.
(6+4)+9=_ or 6+(4+9)=_
19
Associative Property
Round the numbers to the tens place and then add.
239+392=
600
346
+514
860
2,564 + _________________= 2,664
100
States that the order in which numbers are added does not change the sum.
Associative Property
Answer the Problem and Name the Property.
12+13=_ or 13+12=_
25
Commutative Property
Round the numbers to their greatest place value and add together.
34+17=
50
5,280
+4,203
9,483
Penny walked her dog for 29 minutes on Friday, 35 minutes on Saturday, and 41 minutes on Sunday. How many total minutes did she walk her dog?
105
States that the way the addends are (grouped) does not change the sum.
Commutative Property
Answer the Problem and Name the Property.
(10+23)+19=_ or 10+(23+19)=_
52
Associative Property
Round the numbers to their greatest place value and then add them.
388+311=
700
5,618
+9,455
15,073
If Jeff studies for 37 minutes in the morning and 42 minutes in the evening, about how many minutes did he study in all? (About means to round!)
80