Unit 1 Math Vocabulary Flashcards
What is a number model?
A number sentence showing a math fact.
ex . 2 x 4=8
What is a rectangular array?
An arrangement of objects into rows and columns.
Each row has the same number of objects,and each column has the same number of objects.
This represents a multiplication fact.
What is a fact family?
There are four related facts in each fact family,all using the same three numbers.
In multiplication/division fact families there are two multiplication and two division facts.
In an addition/subtraction fact family there are two addition and two subtraction facts.
What is a factor?
The numbers being multiplied together in any multiplication problem.
What is a product?
The answer in any multiplication problem.
What is a factor pair?
A pair of factors that can be multiplied to equal a number.
A number can have more than one factor pair.
What does “divisible by” mean?
When a whole number is divided by another whole number and the quotient is a whole number.
Then, the number is the first whole number is divisible by the second whole number.
What are divisibility rules?
The rules which show what number can be divisible by another number.
What is a prime number?
A number that has only two factors,the number itself and one.
All prime numbers are odd except for two.
What is composite number?
A number with more than two factors.
What is a square array?
A special rectangular array that is always a square.
What is a square number?
A number that is a product of a number being multiplied by itself.
What is an exponent?
It indicates the number of times a number is multiplied by itself.
What is exponential notation?
Any number written with an exponent.
What is a square root?
The name of a number that you get when you unsquare a number
What is a factor rainbow?
In a factor rainbow,the product of each connected factor pair should be equal to the number that the rainbow is representing.
What is a factor string?
A name for a number written as a product or two or more factors.
In a factor string you cannot use the number 1 as a factor.
What is the length of a factor string?
The length of a factor string is equal to the number of factors in a factor string.
The longest factor string for a number is made up of prime numbers.
What is prime factorization?
Prime factorization is a factor string made up of prime numbers.
It is always the longest string for a number.
What is a factor tree?
An easy way to find all the prime factors of a number.
First,write the number
2⃣4⃣
Then,underneath write any factor pair of the number.
2⃣4⃣
↙ ↘
6⃣ 4⃣
Then keep going until you get prime numbers.
2⃣4⃣
↙ ↘
6⃣ 4⃣
↙↘ ↙↘
2⃣ 3⃣ 2⃣ 2⃣
This proves the prime factorization of 24 is 2^3x3
