Rounding
Round 79 to the nearest ten.
80
365 + 621 =
986
987 - 347 =
640
Estimate 68 + 25 by rounding each number to the nearest ten.
70 + 30 = 100
(Identity, Commutative, Associative)
Round 44 to the nearest ten.
40
478 + 305 =
783
849 - 37 =
812
Estimate 79 - 43 by rounding each number to the nearest ten.
80 - 40 = 40
3 + 2 = 2 + 3 is an example of which addition property?
(Identity, Commutative, Associative)
The Commutative Property
Round 380 to the nearest hundred.
400
1,276 + 1,414 =
2,690
340 - 117 =
223
Estimate 105 + 274 by rounding each number to the nearest hundred.
100 + 300 = 400
(2 + 3) + 4 = 2 + (3 + 4) is an example of which addition property?
(Identity, Commutative, Associative)
The Associative Property
Round 1,103 to the nearest hundred.
1,100
18,309 + 10,980 =
29,289
1,760 - 742 =
1,018
Estimate 563 - 321 by rounding each number to the nearest hundred.
600 - 300 = 300
Fill in the blank.
4 + __ = 5 + 4
5 and it's the commutative property
Round 14,522 to the nearest thousand.
11,200 + 1,650 + 78
12,928
15,980 - 12,536 =
3,444
Estimate 3,480 + 1,299 by rounding each number to the nearest thousand.
3,000 + 1,000 = 4,000
Fill in the blank.
6 + (3 + 1) = (6 + __) + 1
3 and it's the associative property