Vocabulary Chapter 2
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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| FACTOR | A factor of a whole number is another whole number that divides into it without a remainder.
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| FACTOR PAIR | A factor pair for a number is two factors whose product equals that number.
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| PRIME NUMBER | A whole number greater than 1 that has only two factors: 1 and itself
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| COMPOSITE NUMBER | A whole number greater than 1 that has more than two factors.
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| PRIME FACTORIZATION | The prime factorization of a composite number shows that number written as a product of prime numbers.
Ex. The prime factorization of 72 is:
2 x 2 x 2 x 3 x 3
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| COMMON FACTOR | A factor that two or more numbers have in common.
Ex. 5 is a common factor of 15, 25, 40
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| GREATEST COMMON FACTOR (GCF) | The GCF (greatest common factor) is the biggest common factor of two or more numbers.
Ex. factors of 12: 1, 2, 3, 4, 6, 12
factors of 18: 1, 2, 3, 6, 9, 18
6 is the GCF of 12 and 18
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| RELATIVELY PRIME | Two or more numbers are relatively prime if their only common factor is 1.
Ex. 8 and 15 are relatively prime because the only factor they have in common is 1.
Ex. 7 and 9 are relatively prime.
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| FACTOR TREE | A diagram used to determine the prime factorization of a composite number.
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| NUMERATOR | A numerator is the number above the fraction bar that tells how many equal parts are chosen.
Ex. in the fraction 3/4, 3 is the numerator
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| DENOMINATOR | The denominator is the number written below the fraction bar that tells the number of parts a whole is divided into.
Ex. in the fraction 3/4, 4 is the denominator
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| DECIMAL | A number that uses a decimal point to show values less than 1, such as tenths and hundredths.
Ex. 2.3, or 2/3, is two and three tenths;
1.25, or 1/25 is one and twenty-five hundredths
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| SIMPLEST FORM | A fraction in which the numerator and denominator have no common factors except for 1.
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| MULTIPLE | A multiple of a whole number is the product (x) of that number and another whole number.
Ex. 35 is a multiple of 7 since 35 = 7 x 5
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| COMMON MULTIPLE | A multiple that two or more numbers have in common.
Ex. 24 is a common multiple of 3, 8, and 12
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| LEAST COMMON MULTIPLE (LCM) | A LCM (least common multipe) is the smallest common multiple of two or more numbers.
Ex. the LCM of 6 and 15 is 30
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| A number that contains a whole number and a fraction.
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| EQUIVALENT FRACTIONS | Fractions that are equal, meaning they describe the same portion of a whole but use different numbers.
Ex. 1/2 and 2/4 are equivalent fractions
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| LOWEST TERMS | A fraction is in lowest terms if its numerator and denominator are relatively prime.
Ex. 3/4 is in lowest terms because the only common factor of 3 and 4 is 1
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| REPEATING DECIMAL | A decimal with a pattern of digits that repeat without stopping.
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| POSITIVE NUMBER | A number that is greater than 0.
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| NEGATIVE NUMBER | A number that is less than 0.
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| OPPOSITES | Two numbers that are the same distance from 0.
Ex. -4 and 4
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| ABSOLUTE VALUE | The distance a number is from 0, this is always a positive number.
Ex. the absolute value of -15 is 15
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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.
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.
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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