Download - Review: Rounding Numbers
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Review: Rounding Numbers
Properties of
Addition
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Round to the nearest thousand.
684,826
If the number next door is 5 or more,we add 1 more.
Rounding
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Round to the nearest hundred.
6,852 A) 7,000B) 6,800C) 6,000D) 6,900
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Round to the nearest thousand.
24,384 A) 24,300B) 24,400C) 24,000D) 25,000
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Round to the greatest place.
45,842 A) 45,000B) 40,000C) 50,000D) 45,800
hund
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thou
sand
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ones
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mill
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nds
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reds
tens
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Properties of Addition
• Commutative Property
• Associative Property
• Identity Property
You can add two numbers in any order.
You can change the grouping of addends.
The sum of any number and 0 is that number.
Example: 12 + 25 = 25 + 12
Example: 12 + (20 + 5) = (12 + 20) + 5
Example: 58 + 0 = 58
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Which property is represented by this problem?
64 + 0 = 64
a) Commutative Property
b) Associative Property
c) Identity Property
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Which property is represented by this problem?
64 + 19 = 19 + 64
a) Commutative Property
b) Associative Property
c) Identity Property
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Which property is represented by this problem?
13 + (4 + 9) = (13 + 4) + 9
a) Commutative Property
b) Associative Property
c) Identity Property
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Which property is represented by this problem?
43 + 27 = 27 + 43
a) Commutative Property
b) Associative Property
c) Identity Property
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Which property is represented by this problem?
36 + 12 = 12 + 36
a) Commutative Property
b) Associative Property
c) Identity Property
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Which property is represented by this problem?
3 + (4 + 5) = (3 + 4) + 5
a) Commutative Property
b) Associative Property
c) Identity Property
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Which property is represented by this problem?
A + 0 = A
a) Commutative Property
b) Associative Property
c) Identity Property
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Which property is represented by this problem?
A + B = B + A
a) Commutative Property
b) Associative Property
c) Identity Property
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Which property is represented by this problem?
a) Commutative Property
b) Associative Property
c) Identity Property
A + (B + C) = (A + B) + C
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Use your knowledge of the properties of addition to find the missing numbers
in this problem.
48 + 12 = ____ + 48
A) 48B) 12C) 60D) 36
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Use your knowledge of the properties of addition to find the missing numbers
in this problem.
95 + (5 + 115) = ( 95 + 5) + ___
A) 95B) 5C) 115D) 215
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Use your knowledge of the properties of addition to find the missing numbers
in this problem.
27 + ___ = 27
A) 27B) 54C) 0D) 72
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Use your knowledge of the properties of addition to find the missing numbers
in this problem.
63 + ____ = 56 + 63
A) 63B) 65C) 56D) 36
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Use your knowledge of the properties of addition to find the missing numbers
in this problem.
___ + 0 = 238
A) 0B) 12C) 283D) 238
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Use your knowledge of the properties of addition to find the missing numbers
in this problem.
16 + (15 + 26) = ( __ + 15) + 26
A) 16B) 15C) 26D) 57