Chapter 2 Math Vocab 7th Grade Pre Algebra
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Base | When a number is written in exponential form, the number that is used as a factor.
(Example: 5^4 (5 is the base) which equals 5x5x5x5.)
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| Composite Number | A whole number greater than 1 with more than two factors. (Example: 24 is a composite number that has 1,2,3,4,6,8,12,and 24 as factors.)
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| Divisible | A number is this term by a second whole number if the first number can be divided by the second number with a remainder of 0. (Example: 16 is divisible by 1,2,4,8,and 16.
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| Exponent | Tells how many times a number, or base, is used as a factor. (Example: 3^4 (4 is the exponent) equals 3x3x3x3.
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| Factor | A whole number that divides another whole number with a remainder of 0. (Example: 1,2,3,46,12,18,and 36 are factors of 36.)
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| Formula | A rule that shows the relationship between two or more quantities. (Example: The formula p=2L+2W gives the perimeter of a rectangle in terms of its length and width.
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| Greatest Common Factor (GCF) | This term of two or more numbers is the greatest number that is a factor of all of the numbers. (Example: The GCF of 12 and 30 is 6.)
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| Least Common Denominator (LCD) | This term of two or more fractions is the least common multiple of their denominators. (Example: The LCD of fractions 3/8 and 7/10 is 40.
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| Least Common Multiple (LCM) | This term of two numbers is the smallest number that is a multiple of both numbers. (Example: The LCM of 15 and 6 is 30.)
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| Multiplicative Inverse | The reciprocal of a number is called this term. (Example: The multiplicative inverse of 4/9 is 9/4.
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| Power | A number that can be expressed using a base and exponent. (Example: 3^4,5^2, and 2^10 are powers.
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| Prime Factorization | Writing a composite number as the product of its prime factors is the prime factorization of the number. (Example: The prime factorization of 12 is 2x2x3, or 2^2x3.)
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| Prime Number | A whole number with exactly two factors, 1 and itself. (Example: 13 is a prime number because its only factors are 1 and 13.)
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| Rational Number | Any number written as a quotient of two integers where the denominator is not 0. (Example: 1/3,-5,6.4,0.666...,-2 4/5,0, and 7/3 are rational numbers.
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| Reciprocals | Two numbers are this term if their product is 1. (Example: The numbers 4/9 and 9/4 are reciprocals.
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| Relatively Prime | A fraction a/b is in simplest form when a and b are relatively prime, which means they only have 1 as a common factor. (Example: 9/10, 1/4, and 2/3 are examples of this term.)
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| Repeating Decimal | A decimal that repeats the same digits without end. The repeating block can contain one digit or more than one digit. (Example: 0.888...=0.8 with the repeating sign over 8.
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| Scientific Notation | A number is in scientific notation if the first factor is greater than or equal to 1 and less than 10, and the second factor is a power of 10. (Example: 37,000,000 is written as 3.7x10^7 in this term.
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| Terminating Decimal | A decimal that stops. (Example: Both 0.6 and 0.7265 are this term.)
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
laurensellars
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