Math Vocabulary Review You Can Do It!. What is a prime number?  A number that has only itself and one as its factors.  Which of the following numerals.

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Presentation transcript:

Math Vocabulary Review You Can Do It!

What is a prime number?  A number that has only itself and one as its factors.  Which of the following numerals is a prime number?  A) 7  B) 18  C) 20  D)31

What is a composite number?  A number that has more than one and itself as factors.  Which of these numerals are composite?  A) 22  B) 17  C) 34  D) 1,000

A numerator is…  The top number in a fraction.  What are the numerators in the following fractions?  A) 7/8  B) 9/10  C) 6/7

A denominator is…  The bottom number in a fraction.  Which numbers in the following fractions are denominators?  A) 2/8  B) 4/5  C) 3/7

What is the difference between the GCF and the LCM?  GCF: the greatest common factor  LCM: the least common multiple  Examples of the LCM:  8 and 6 share a LCM of 24  12 and 10 share a LCM of 60  Examples of the GCF:  12 and 20 share the factors of 2 and 4  16 and 40 share the factors of 2, 4, and 8

What is an equivalent fraction?  An equivalent fraction refers to the same, or equal amounts of fractions. When we compare them, they are the same, regardless of the difference in the denominator.  Examples could be:  ½=2/4=3/6=4/8=5/10=6/12=7/14=8/16  To make an equivalent fraction, multiply the numerator and denominator by the same number.  For example, to change 2/3 into an equivalent fraction, multiply 2 by 2 and 3 by 2, to get 4/6.

What is a reciprocal fraction?  It is the opposite (think flipped) fraction.  For example, the reciprocal of 2/3 is 3/2.  Can you make the reciprocal fraction for the following numbers?  A) 7  B) 5/6  C) 8/9  D) 121

What is an improper fraction?  An improper fraction is when the numerator is larger than the denominator.  Can you change these fractions into improper fractions?  A) 7 ½  B) 18 ¾  C) 20 2/3

Who can tell me what a mixed number is?  A mixed number is a whole number and a fraction.  Can you change these improper fractions into mixed numbers?  A) 7/2  B) 81/5  C) 26/3  D) 33/4

A simplified or reduced fraction…  Refers to REDUCING the fraction to its lowest possible form.  To reduce a fraction, you must have a common factor between the numerator and denominator in order to reduce it.  For example, 6/8 can be reduced by dividing both 6 and 8 by 2. Our reduced fraction would be ¾.