6 numbers and operation
Transcript of 6 numbers and operation
MCA-III MATH VOCABULARY FROM DRAFT TEST SPECIFICATIONS
By J. Scheumann and C. Sorenson 2011
Source: MCA III DRAFT Test Specifications for Mathematics, Oct. 15, 201, http://children.state.mn.us (Assessment and Testing/MCAs/Test Specs)
Numbers and Operations
• 6th grade Math Vocabulary
By J. Scheumann and C. Sorenson 2011
inequality
A number sequence stating that two quantities are not
equal, or might not be equal.
Click here for a 2 min video clip.
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exponent
The raised number in a power that tells the number of times the base is used as a
factor.
4 = 4 * 4 * 43
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A device for locating points in a plane by means of ordered number pairs or
coordinates.
(3,2)
coordinategrid
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axis
y axis
X axis
horizontal axisX axis
Vertical axisY axis
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prime factorization
A number expressed as a product of prime
factors.
The prime factorization of 24 is
2 * 2 * 2 * 3or 2 * 3
3
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factorization
The original number is represented as a product of factors, and each of those factors is represented as a
product of factors, and so on, until the factor string consists
of prime numbers.
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multiplication
3 x 4
3(4)
3 • 4
SIGNAL WORDS
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greatest common factor
The largest factor that two or more numbers
have in common.
The common factors 24and 36 are 1, 2, 3, 4, 6and 12. The greatest
common factor is24 and 36 is 12.
By J. Scheumann and C. Sorenson 2011
least common multiple
The smallest that is a multiple of two or more numbers.
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integer
Any whole number or its opposite.
-2, 2
6, -100are examples of integers
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rational number
A rational number is a number that can be written as a simple
fraction (i.e. as a ratio).
Click here for a two minute video clip
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irrational number
But some numbers cannot be written as a ratio of two integers
...
...they are called Irrational Numbers.
Click here for a two minute video clip
π =3.1415926535897932384626433832795 (and more...)
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reciprocal
.What to multiply a value by to get 1.
http://www.mathsisfun.com/reciprocal-fraction.html
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percent (%)
Per hundred, or out of a hundred.
1 100
or 0.01
1 one-hundredth
1%=
15%= 15 100
or 0.15
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Click here to convert fractions, to decimals to percents.
ratio
A ratio is a comparison of two numbers or measurements
Click here to try it!
if there is 1 boy and 3 girls you could write the ratio as:
1:3 (for every one boy there are 3 girls)1/4 are boys and 3/4 are girls0.25 are boys (by dividing 1 by 4)25% are boys (0.25 as a percentage)
rate
A comparison of two quantities with unlike
units.
A speed such as 55 miles per hour
compares distancewith time.
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unit rate
When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per
hour, they are called unit rates.
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2.48/pound
$2.48 per pound
per
In each or for each.
Five chairsper row
per means to divide
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unit rate notation
¼1÷4
1 to 4 1:4 1 out of 4
25%
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