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Math Vocabulary Review

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.

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Math Vocabulary Review

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  1. Math Vocabulary Review You Can Do It!

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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.

  8. 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

  9. 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

  10. 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

  11. 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.

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