1. Fraction Division and GCF/LCM 15 question review

2. Question 1
Find the GCF of 42 and 56. 14

3. Question 2
Find the LCM of 6 and 8. 24

4. Question 3
3 4 ÷
3 ½

5. Question 4 ÷
1 𝟏𝟕 𝟐𝟓

6. Question 5
Buddy is sick. Starting tonight at 8 p.m. he needs to take doggie cough syrup every 3 hours and a vitamin every 4 hours.
How many hours will pass before he takes a vitamin and cough syrup at the same time? What time will it be?
Answer: He will take them together again in 12 hours at 8:00 am the next day. You needed to find the LCM of 3 and 4 which is 12, so in 12 hours he will take them together.

7. Question 6
Jesse ate 22 ¾ hot dogs in 13 minutes. How many hot dogs did he average per minute?
Answer: He averaged 1 ¾ hot dogs per minute. To find the average per minute (“per” means in one minute) you divide the total number of hot dogs by the total number of minutes.

8. Question 7
At Noah’s restaurant, one serving of chili is 1 ½ cups. If the chef makes 48 cups of chili, how many servings does he make?
32 servings. If you set this up wrong you probably got Have ÷ need! Not first number divided by second number 

9. Question 8
To make a scarf, Anna needs ½ of a yard of fabric. If she has 1 ¾ yards of fabric, how many scarves can she make?
Anna can make 3 ½ scarves, but nobody would want half of a scarf so Anna will make 3 scarves and have a little bit of fabric leftover!

10. Find the greatest common factor of 24 and 30
Question 9
Find the greatest common factor of 24 and 30
The GCF of 24 and 30 is 3.
Disagree
The GCF is 6

11. Find the least common multiple of 5 and 12. The LCM is 60. Agree
Question 10
Find the least common multiple of 5 and 12. The LCM is 60. Agree

12. Question 11 6/12 or 1/2 Disagree
¾ ÷ 2/3
6/12 or 1/2
Disagree
To solve a division fraction problem, the second fraction must be flipped.
The correct answer is 1 1/8.

13. Question 12
4 2/3 ÷ 1/4 2 14/15 Agree 14/3 ÷ 4/1 14/3 x 1/4 14/12 = 1 2/12 1 1/6

14. Question 13
Ellen has thirty pounds of chocolate. She wants to divide the chocolate into ¾ pound bags. How many bags of chocolate can she make? Ellen can make 40 bags of chocolate weighing ¾ pounds. Agree 30/1 ÷ ¾ = 30/1 x 4/3 = 120/3 = 40

15. Question 14
Jill made 12 cakes with 1 1/3 tablespoons of vanilla. How much vanilla would she need to make just ONE cake? She needs 9 tablespoons of vanilla for one cake. Disagree 1 1/3 ÷ 12

16. Question 15
Every 6 months Mrs. Moreland changes her refrigerator water filter. Every 3 months Mrs. Moreland changes her air conditioning filters. When will Mrs. Moreland change her refrigerator filters and her air conditioning filters on the same month? Every 18 months Disagree Every 6 months!