Which property of addition is this an example of?
8+9=9+8
Commutative Property of Addition
200
3,179+834=
4,013
200
248-199=
49
200
Estimate the difference of 92-74.
20
200
Which property is this an example of?
2+(1+4)=(2+1)+4
Associative Property of Addition
300
What is a word or phrase you would find in a word problem that let's you know you should add?
total, sum, in all, altogether (any word from the poster is correct!)
300
102-38=
64
300
CJ read 15 hours last month. This month, CJ has read 28 hours. Estimate the number of hours he has read in the past two months.
about 50 hours
300
Which property is this an example of?
456+0=0
Identity Property of Addition
400
What is the term for the answer to an addition problem?
Sum
400
3,000-1,743=
1,257
400
Daniela has eaten 76 school lunches at Lakewood. Alagie has eaten 22 school lunches at Lakewood. About how many schools lunches have they eaten in all?
about 100 school lunches
400
Which property of addition states that the grouping of the addends (the numbers you are adding together) does not change the sum?
Associative Property of Addition
500
What term is used for the numbers you add together in an addition problem?
Addends
500
What is a word or phrase you would see in a word problem that means subtraction?
difference, how many more, less (any words from the poster!)
500
Ms. Herrion bought 457 pencils at the beginning of the year. At the end of the year, she only had 21 left. About how many pencils were used during the school year?
about 440 pencils
500
Which property of addition states that you can add two numbers in any order and it does not change the sum?