Show an example of the Identity (Zero) Property of Addition using the numbers 5 and 0.
5+0=5
100
A bakery had 34 cookies in the morning but sold 12 in the afternoon. How many cookies were left?
34-12= 22 cookies
100
Round to the nearest hundred
266
300
100
Find the value for "n" that would make the equation true.
35= 30 + n
n=5
100
Estimate the sum 12+23
10+20=30
200
Show an example of the Commutative (Order) Property of Addition by using the numbers 7 and 5.
7+5=5+7
200
Kara spent 54 minutes watching TV and 15 minutes reading a book. How many more minutes did she watch TV?
54-15= 39 minutes
200
Round to the nearest ten
421
420
200
Find the value for "c" that would make the equation true.
13-c=7
c=6
200
Estimate the difference 134-26
100-30=70
or
130-30=100
300
Show an example of the Associative (Grouping) Property using the numbers 3,4, and 5.
Answers may vary:
(3+4)+5=3+(4+5)
300
One bus holds 211 people and another bus holds 182 people. Give an estimate of the total number of people the two buses can hold.
200+200= 400
or
210+180= 390
300
Round to the nearest ten and hundred
176
200 and 180
300
Find the value for "m" that would make the equation true.
24= m + 12
m=12
300
Round to the nearest hundred to estimate the difference 762-412
800-400=400
400
What property of addition is shown in the number sentence 3+(6+5)=(6+5)+3
The Commutative (Order) Property of Addition
400
Jason played soccer 42 minutes on Monday and 26 minutes on Tuesday. Use the break apart method to find out how many minutes he played soccer in all?
40 + 2 20+6
40+20=60
6+2=8
60+8= 68 minutes
400
Round to the nearest ten and hundred
888
890 and 900
400
There are 12 students on a field trip. 4 of the students go for a walk and leave the others behind. Which number sentence shows a way to find out how many students did not go for a walk?
a. 4-n=12
b. 12+4=n
c. 12-4=n
d. 12-n=4
C
400
The school store sold 98 erasers in the morning and 44 erasers in the afternoon. Estimate the sum.
40+100=140
500
Mark says that 11+12 is not equal to 12+11. Is he correct or incorrect? Explain
Mark is incorrect because according to the Commutative (Order) Property of Addition no matter what order the addends are in, the sum will still be the same.
500
Jonathan listened to music for 32 minutes on Saturday and 21 minutes on Sunday. Is 50 minutes a reasonable number for how much music he listened to in all?
Yes because 30+20=50
500
Round to the nearest ten and hundred
666
670 and 700
500
Find the value of "n" to make the number sentence true.
76=14+n
n=62
500
A theatre has 432 seats. There are 212 people that buy a ticket for the show. Which is the best estimate of how many seats are empty?
a. 220
b.230
c.240
d.250