eQuizShow
Unit 1 Math
Vocabulary
Question: What do you call a fraction that has a whole number part and a fraction part?
Answer: A mixed number
Question: What do you call fractions that have only 1's in the numerator portion of the fraction?
Answer: Unit fractions
Question: 2/5 and 5/6 do NOT have common ______________?
Answer: Denominators
Question: What do you call a fraction that has been rewritten with a common denominator?
Answer: An equivalent fraction
Question: What do you call a fraction that has a larger number in the numerator portion than in the denominator? (hint: the bunk bed could collapse if the heavier person is on the top) AND What do you use to avoid having to simplify a fraction?
Answer: An improper fraction/LCD or LCM (least common denominator/least common multiple)
Equal Rights!!!
Question: Give an equivalent fraction for 5/6.
Answer: Possible answers: 10/12; 15/18
Question: Give an equivalent fraction to 9/15.
Answer: Possible answers: 3/5; 18/30
Question: Give an equivalent fraction to 2/10.
Answer: Possible answers: 1/5; 20/100
Question: Are 3/4 and 6/8 equivalent fractions? Why?
Answer: Yes, they are. If you multiply the numerator and denominator in 3/4 by 2, you will get 6/8.
Question: Name a fraction and an equivalent fraction for it. Explain.
Answer: Answers will vary.
Compare Me
Question: 3/10 vs. 3/11
Answer: 3/10 > 3/11
Question: 5/9 vs. 7/12
Answer: 5/9 < 7/12
Question: 1/3 vs. 3/8
Answer: 1/3 < 3/8
Question: If two fractions have the same numerator, such as 4/5 and 4/6, which one is bigger? Why?
Answer: 4/5 is bigger, because the smaller the denominator, the bigger the "pieces" there are.
Question: If two fractions have the same denominator, such as 6/7 and 3/7, which one is bigger. Explain your answer. AND Which benchmark fraction is 6/7 closer to, 0, 1/2, or 1? Explain.
Answer: 6/7 is bigger. When two fractions have the same denominator, which ever one has more "pieces," is the bigger fraction. 6/7 is closer to 1, because it is only 1 away from 7/7, which would be one whole.
Be Reasonable!
Question: Ms. Thames walked to school from her house in Laredo Ranch. It is 5 1/2 miles away. She ran the first 4 5/8 of a mile, but she had to walk the last 7/10 of a mile. How far is it from Ms. Thames' house to Ellsworth Elementary? Check to make sure your answer is reasonable.
Answer: 5 13/40 miles
Question: Mr. Olsen has 2 3/4 cups of raisins. He wants to make his famous raisin bread recipe that calls for 4 1/3 cups of raisins. How many more cup(s) of raisins does he need? Is 7 cups a reasonable answer?
Answer: 1 7/12 cups of raisins/no
Question: Mrs. Gutierrez bought 5 1/4 yards of blue bulletin board paper and 3 2/3 yards of red bulletin board paper for her back wall in her classroom. She gave 2 3/4 yards to Mrs. Bencomo. How much bulletin board paper does she now have left? EXPLAIN how you know your answer is reasonable.
Answer: 6 1/6 yards of bulletin board paper; 5 1/4 yards rounds to 5, & 3 2/3 rounds to 4. 2 3/4 rounds to 3, so she had about 9 yards and gave away about 3 yards, leaving her with about 6 yards.
Question: Puzzled Penguin did the math problem 7 1/5 - 1 2/3 on his whiteboard. His answer was 6 8/15. Did he get the problem right? Does he EVER? :) Why or why not? Give the correct answer if he is wrong and explain.
Answer: No, he didn't. The correct answer is 5 8/15. He forgot to make the whole number 7 a 6 when he ungrouped so that he could subtract the numerators in the fractions.
Question: Explain how you know that the sum in this problem is NOT REASONABLE WITHOUT figuring out the actual sum. 8/9 + 1/7 = 35/63
Answer: Possible response: 8/9 is almost one whole. How could adding another fraction to that equal out to be barely more than 1/2?! 35 is barely more than 1/2 of 63.
He Giveth and Taketh Away
Question: Add or Subtract: 2/9 + 2/3
Answer: 8/9
Question: Add or Subtract: 5/8 - 3/10
Answer: 13/40
Question: Add or Subtract: 6/7 + 2 5/6
Answer: 3 29/42
Question: Add or Subtract: 4 1/5 - 3 7/10
Answer: 1/2
Question: Add or Subtract: 1 5/8 + 2 1/2
Answer: 4 1/8