Review: Rounding Numbers
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Review: Rounding Numbers Properties of Addition
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Review: Rounding Numbers. Properties of Addition. Rounding. 684,826. If the number next door is 5 or more, we add 1 more. Round to the nearest thousand. hundred thousands. hundred millions. ten thousands. ten millions. hundreds. thousands. millions. tens. ones. 6,852. 7,000 - PowerPoint PPT Presentation
Transcript of Review: Rounding Numbers
Review: Rounding Numbers
Properties of
Addition
Round to the nearest thousand.
684,826
If the number next door is 5 or more,we add 1 more.
Rounding
Round to the nearest hundred.
6,852 A) 7,000B) 6,800C) 6,000D) 6,900
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red
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sand
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ones
hund
red
mill
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ten
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ions
mill
ions
ten
thou
sand
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reds
tens
Round to the nearest thousand.
24,384 A) 24,300B) 24,400C) 24,000D) 25,000
hund
red
thou
sand
s
ones
hund
red
mill
ions
ten
mill
ions
mill
ions
ten
thou
sand
sth
ousa
nds
hund
reds
tens
Round to the greatest place.
45,842 A) 45,000B) 40,000C) 50,000D) 45,800
hund
red
thou
sand
s
ones
hund
red
mill
ions
ten
mill
ions
mill
ions
ten
thou
sand
sth
ousa
nds
hund
reds
tens
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
Which property is represented by this problem?
64 + 0 = 64
a) Commutative Property
b) Associative Property
c) Identity Property
Which property is represented by this problem?
64 + 19 = 19 + 64
a) Commutative Property
b) Associative Property
c) Identity Property
Which property is represented by this problem?
13 + (4 + 9) = (13 + 4) + 9
a) Commutative Property
b) Associative Property
c) Identity Property
Which property is represented by this problem?
43 + 27 = 27 + 43
a) Commutative Property
b) Associative Property
c) Identity Property
Which property is represented by this problem?
36 + 12 = 12 + 36
a) Commutative Property
b) Associative Property
c) Identity Property
Which property is represented by this problem?
3 + (4 + 5) = (3 + 4) + 5
a) Commutative Property
b) Associative Property
c) Identity Property
Which property is represented by this problem?
A + 0 = A
a) Commutative Property
b) Associative Property
c) Identity Property
Which property is represented by this problem?
A + B = B + A
a) Commutative Property
b) Associative Property
c) Identity Property
Which property is represented by this problem?
a) Commutative Property
b) Associative Property
c) Identity Property
A + (B + C) = (A + B) + C
Use your knowledge of the properties of addition to find the missing numbers
in this problem.
48 + 12 = ____ + 48
A) 48B) 12C) 60D) 36
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
Use your knowledge of the properties of addition to find the missing numbers
in this problem.
27 + ___ = 27
A) 27B) 54C) 0D) 72
Use your knowledge of the properties of addition to find the missing numbers
in this problem.
63 + ____ = 56 + 63
A) 63B) 65C) 56D) 36
Use your knowledge of the properties of addition to find the missing numbers
in this problem.
___ + 0 = 238
A) 0B) 12C) 283D) 238
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
