Chapter 2 Vocabulary Flashcards
A calculated guess that is close to the exact number.
Estimate
An estimate that is close to the actual number.
Reasonable
Using the front digit to get an estimate.
Ex:324 estimate round to 300
Front end estimation
To give an approximate value.
Ex: round to the nearest hundred
3,425 would round to 3,400
Rounding
Answer when one number is multiplied by another.
Ex: 67 x 42 =2,814 (2,814 is the product)
Product
Answer when one number is multiplied by another.
Ex:129 / 3 = 43(43 is the quotient)
Quotient
The number in the division problem that is divided into the dividend.
Ex:129 / 3 =43(129 is the dividend
Dividend
The numbers that you multiply to get the product or multiple.
Ex: 3 x 4 = 12
2 x 6 = 12
1 x 12 =12
1,2,3,4,6,and 12 are all factors of 12
Factor
The product or answer to a multiplication problem
Ex: list the multiples of 12
12,24,36,48,60,…(do not include zero when listing multiples
Multiple
The SMALLEST multiple two or more numbers have in common.
Ex: list the multiples of 6 and 8
6: 6,12,18,24,30,36,42,48…
8: 8,16,24,32,40,48,56…
LCM= 24
Least common factor （LCM)
A factor that 2 or more numbers have in common.
Ex: list factors of 4 and 6
4: 1,2,4
6: 1,2,3,6
A common factor of 4 and 6 is 2 (do not use1 as a common factor
Common factor
The LARGEST factor that two or more numbers have in common.
Ex. Find the GCF of 12 and 36
12: 1,2,3,4,6,12
36: 1,2,3,4,6,12
GCF = 12
Greatest common factor
A number that has ONLY TWO factors-1and itself.
Ex: 5 (only factors of 5 ~1 and 5)
Prime number
The number 1 is neither prime or composite -it only has one factor,which is its.
Neither prime or composite
A number that has three or more factors
Ex: 16 ~ factors of 16 : 1,2,4,8,16
Composite number
