Show:
Addition Properties
Fact Families
Estimating Sums
Estimating Differences
Miscellaneous
100
Create an addition problem using the Identity Property of Addition.
Example answer: 0+14=14
100
How many number sentences are in a fact family?
4
100
Round to the nearest ten to estimate the sum. 101 + 155 = _____
260
100
Round to the nearest 10 to estimate the difference: 764 - 318 =
760 - 320 = 440
100
Name all three properties of addition.
Commutative, Associative, and Identity
200
What is the missing number? 3 + (7 +1) = 3 + _____. This addition problem is an example of which property of addition?
8 Associative Property of Addition
200
Find the missing number. 8 + ___ = 19
11
200
Round to the nearest ten to estimate the sum. 145 + 29 = ______
180
200
Round to the nearest 10 to estimate the difference: 353 - 127 =
350 - 130 = 220
200
Write the fact family for the following numbers: 13, 7, 6
6 + 7 = 13 7 + 6 = 13 13 - 6 = 7 13 - 7 = 6
300
This property of addition states that... the sum of any number and ZERO is that same number.
Identity Property of Addition
300
Individually, create a fact family. Your fact family must have 2 subtraction problems and 2 addition problems. Everyone in your group must write down a different fact family!
Sample answer: 3+6=9 6+3=9 9-3=6 9-6=3
300
Round to the nearest hundred to estimate the sum. 312 + 189 = ______
500
300
Round to the nearest 100 to estimate the difference: 641 - 284 =
600 - 300 = 300
300
Write a fact family for the following numbers: 24, 10, 14
10 + 14 = 24 14 + 10 = 24 24 - 10 = 14 24 - 14 = 10
400
This property of addition says that... you can add numbers in any ORDER and the sum (answer) will be the same.
Commutative Property of Addition
400
Write a fact family with the sum of 17.
Answers will vary! Sample answer: 10+7=17 7+10=17 17-10=7 17-7=10
400
Round to the nearest thousand to estimate the sum. 9,100 + 5,760 = ________
15,000
400
Round to the nearest 100 to estimate the difference: 867 - 359 =
900 - 400 = 500
400
Round to the nearest 10 to solve: 954 + 78 =
950 + 80 = 1,030
500
This addition property says that... you can GROUP addends in any way and the sum will be the same.
Associative Property of Addition
500
Hannah found 19 seashells and 12 starfish at the beach. Write a fact family to show what Hannah found on the beach.
19+12=31 12+19=31 31-12=19 31-19=12
500
Write two numbers from the following list that have a sum of about 500. 78, 188, 422, 325
78 + 422 AND 188 + 325
500
Round to the nearest 100 to estimate the difference: 1,140 - 327 =
1,100 - 300 = 800
500
Round to the nearest 100 to solve: 3,692 - 1,470 =
3,700 - 1,500 = 2,200