Vocabulary
A number close to the exact number.
Estimate
4+6=
6+4=
Commutative
4+6=10
6+4=10
Round to the indicated place value and solve:
38+17; tens
40+20=60
333+151=
333+151=484
There are 22 students in Mrs. Hardin's class and 24 in Mrs. Matson's class, how many students are in both classes?
22+24=46
To rename a number using place value.
Regroup
Solve and name the property:
9+0=
Identity
9+0=9
Round to the indicated place value and solve:
521+359; hundreds
500+400=900
432+328=
432+328=760
There are 101 students in the 3rd grade and 127 students in the 4th grade. How many students are there all together?
101+127=228
The sum of any number and zero is the number.
Identity Property of Addition
Solve and name the property:
9+2=
2+9=
Commutative
9+2=11
2+9=11
Round each addend to its greatest place value and solve:
13+26
10+30=40
256+325=
256+325=581
Hailey has 347 jelly beans. Caleb has 243 jelly beans. How many jelly beans do they have together?
347+243=590
The way addends are grouped does not change the sum.
Associative Property of Addition
Solve and name the property:
4+(3+2)=
(4+3)+2=
Associative
4+(3+2)=9
(4+3)+2=9
Round each addend to its greatest place value and solve:
657+115
700+100=800
539+272
539+272=811
Jayson put 172 pennies into a jar. The next day, he then added 229 more pennies to the jar. How many pennies does Jayson now have?
172+229=401
The order in which numbers are added does not change the sum.
Commutative Property of Addition
7+(2+1)=
(7+2)+1=
Associative
7+(2+1)=10
(7+2)+1=10
Round each addend to its greatest place value and solve:
451+248
500+200=700
499+199=
499+199=698
Mrs. Hardin gave students 153 Paw Tickets in September. In October, she gave students 288 Paw Tickets. How many tickets did she give out in September and October?
153+288=441