Addition Properties
Find the unknown and what property is it?
( __ + 8) + 7 = 9 + (8 + 7)
9
Associative
100 less than 37,972
37,872
8,825-6,397
2,428
1,454 + 355
Hundreds
1,500 + 300 =1,800
10,345+20,344
130,689
Find the unknown and what property is it?
__ + 0 = 19
19
Identity
1 less than 37,937
37,936
223+728
951
2,871 + 427
Hundreds
2,900 + 400 =3,300
340-120
220
Find the unknown and what property is it?
14 + 13 = 13 + ___
14
Commutative
10,000 more than 374
10,374
684-169
Make a ten
515
$27,986 - $4,521
Thousands
$28,000 - $5,000 =$23,000
827,120 + 123,492
950,612
Give an example of Commutative Property
______
45,311 + _______ = 46,311
1,000
What is the answer to an ADDITION problem called?
Sum
What is the answer to a SUBTRACTION problem called?
Difference
349,123 - 252,125
96,998
Can any number complete the number sentence? Explain.
(23 + __) + 19 = 23 + (__ + 19)
Yes! Associative property shows that the same numbers will be on each side.
84,552 + _______ = 94,552
10,000
Attendance at a concert was 12,769. The following evening, the attendance was 13,789. How many more people attended the concert on the second night?
1,020 people
Write two numbers that when rounded to the thousands place have an estimated sum of 10,000.
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Come up with a problem that has a difference of 53,324