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Place Value, Place Value
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Terms in this set (38)
≠
symbol for NOT equal to.
When two values are different, we use the "equals" sign
=
symbol for equal to.
When two values are the same, we use the "equals" sign
place value
the position of a digit in a number. For example, in 59,831 the 9 is in the thousands place
digit
Any of the symbols 0, 1,
2, 3, 4, 5, 6, 7, 8, or 9 used to write numbers
expanded form
A way to write numbers by showing the value of each digit Ex: 253 = 200 + 50 + 3
standard form
A way to write numbers by using the digits
0-9, with each digit having a place value
Ex: 3,540 standard form
estimate
Tells about how many. To find an estimate, round the number and then use whatever sign they give you (add, subtract, multiply, or divide).
word form
A way to write numbers using words.
rounding
Rounding means making a number simpler but keeping its value close to what it was. For example, 287 is closest to 300 so you would round 287 to 300. (Say this chant: "5 or more raise the score, 4 or less, let it rest")
period
A group of three digits separated by a comma. (ones, thousands, millions)
sum
answer to an addition problem
difference
answer to a subtraction problem
numerical expression
has numbers and operation signs, but no equals sign
equation
A mathematical sentence that contains an equals sign.
2 + 3 = 5
value
the amount that a digit means in a number.
For example in 54,398, the 4 digit means 4,000
>
When one value is bigger than another,
we can use a "greater than" sign.
<
When one value is smaller than another,
we can use a "less than" sign.
round UP
If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up. Example: 238 rounded to the nearest ten is 240. The 8 means the 3 changes to a 4 and everything after it becomes a zero.
round DOWN
If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down. Example: 623 rounded to the nearest hundred is 600. The 2 means the 6 stays the same and everything after it becomes a zero.
compare numbers
look at two numbers and determine if one is greater than, less than, or if they are the same (equal to)
product
the answer to a multiplication problem
exponent
the number that tells how many times a base is used as a factor
base
a number used as a repeated factor
inverse operations
operations that undo each other
Example: Multiplication and Division
evaluate
to find the value of a mathematical expression
Millions period
...
Ones period
...
Thousands period
...
Comma
...
Ones place
...
Ten place
...
Hundreds place
...
Thousands place
...
Ten thousands place
...
Hundred thousands place
...
Millions place
...
Ten millions place
...
Hundred millions place
...
THIS SET IS OFTEN IN FOLDERS WITH...
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Number Words
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