A review of Unit 1 with error analysis Agree or Disagree A review of Unit 1 with error analysis

Find the greatest common factor of 24 and 30 Question 1 Find the greatest common factor of 24 and 30 The GCF of 24 and 30 is 3. Disagree The GCF is 6

Find the least common multiple of 5 and 12. The LCM is 60. Agree Question 2 Find the least common multiple of 5 and 12. The LCM is 60. Agree

Question 3 400 ÷ 12 33.3333 33 1/3 33 r 4 Agree

The decimals are not lined up. Question 4  13.2 + .68 13.2 +.68 .200 Disagree The decimals are not lined up. The correct answer is 13.88

Question 5 .45 x 12.3 5.535 Agree The number of decimal places in the original problem must equal the number of decimal places in the final answer.

Question 6 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.

Question 7 12 – 0.48 .36 Disagree The decimals were not lined up and the order of the numbers was switched. You must put a decimal and two zeroes behind the 12 to get the correct answer of 11.52.

Question 8 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

Question 9 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 4/3 = 120/3 = 40

Question 10 Jane has $42.75 to buy candy to hand out for Halloween. The Starbursts she wishes to buy are $2.25 for each bag. How many bags can she buy? She can purchase 19 bags of Starbursts. Agree

Question 11 You have 125 laser tag tickets to give to 20 party guests. To be fair, you want each guest to get the same number of tokens. How many should you give each guest? He can give each guest 7 tokens. Disagree The answer is 6.25, so you need to round down. He can only give 6 tickets to each guest. He will have 5 tickets left over

Question 12 Grady the fat cat weighed 45.25 kilograms. His vet put him on a strict diet and he lost 7.9 kilograms. How much does he weigh after losing the weight? He now weighs 44.46 kilograms. Disagree The decimals were not lined up to find this answer. His new weight is now 37.35 kilograms.

Question 13 Elliott is cutting a roll of cookie dough into pieces that are ½ inch thick. If the roll of cookie dough is 5 ½ inches long, which model below best represents the situation? Agree

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

Question 15 Pablo and Jane need 4 boxes of cereal priced at $2.95 per box. How much will the cereal cost? The cost will be $.74 per box. Disagree To solve this problem you should multiply. The correct answer is $11.80.

Question 16 Kim has 25 meters of ribbon to make bows. If each bow requires 0.6 meters of ribbon, how many bows can she make? Kim can make 4 bows. Disagree She can make 41.666 bows. Therefore, she can only make 41 bows.

Question 17 Mark and Jeff are comparing their answers to the problem: 0.8 + 10.339. Their work is shown below. Explain which student is correct. I agree with Jeff. Agree Mark 0.8 +10.339 10.347 Jeff 0.800 +10.339 11.139

She will do both activities in 19 days. Question 18 Inez waters her plants every four days. She trims them every 15 days. She did both today. When will again water and trim the plants on the same day? She will do both activities in 19 days. Disagree You must find the LCM of 4 an 15 to determine the next time she does both activities. She will do them both in 60 days.

Question 19 An airport offers two shuttles that run on different schedules. Shuttle A departs every 6 minutes and shuttle B leaves every 9 minutes. If both shuttles leave the airport at 4:00 p.m., at what time will they next leave the airport together? They will leave the airport together again at 4:18 p.m. Agree It asks for time and not minutes. Since 18 is the LCM, I added 18 minutes to 4:00 p.m.

Question 20 Is this a true or false statement? 65 + 80 = 5(13 + 16) True Agree. The GCF of 65 and 80 is 5, so if I divide 65 and 80 by 5 I am left with 13 and 16.

Question 21 How would you write this number sentence using distributive property? 12 + 44 2(6 + 22) Disagree Two isn’t the GCF of 12 and 44. It should be 4(3 + 11).