please check and see if my answers are correct if not let me know so i can redo these and find where i messed up
1. divid by moving the decimal point
27.3 dived 10^5
my answer .000273
2.Jon spent 1/3 of his study time doing math homework and 2/7 preparing for a history exam. What fraction of his study time remains?
my answer was 13/21
3.find the least common multiple of 10,15,25.
my answer was 150
4. Kristi jogged for 3/5 of an hour, swam for 1/2 of an hour, and rode her bicycle for 3/4 of an hour. How long did she exercise?
my answer 1 17/20
5. add 8/25+3/20
my answer 47/100
#2
2/7=6/21
1/3=7/21
6/21 + 7/21=13/21
21/21 - 13/21=8/21
otherwise it looks ok
I am still not understanding how you arrived at number 2
Find the five-number summary of the following set of numbers.
0.16, 0.08, 0.27, 0.20, 0.22, 0.32, 0.25, 0.18, 0.28, 0.27
Write in decimal form.94 17/ 1,000
Jon spent 1/3 of his study time doing math homework and 2/7 preparing for a history exam. What fraction of his study time remains?
You need to find the LCM (21) that will give you 7/21 and 6/21. "REMAINS" indicates that you will subtract so 7/21 - 6/21 = 1/21.
Hope that helped.
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Your answers are almost correct, but I see a mistake in question #2. Let's go through each question and correct any errors:
1. To divide 27.3 by 10^5, you need to move the decimal point 5 places to the left. Therefore, the result is 0.000273.
2. Jon spent 1/3 of his study time on math homework and 2/7 preparing for a history exam. To find the fraction of his study time remaining, we need to subtract the fractions from 1 (since that represents the whole study time). Thus, the correct answer is 1 - (1/3 + 2/7) = 21/21 - (7/21 + 6/21) = 8/21.
3. To find the least common multiple (LCM) of 10, 15, and 25, we can start by listing the multiples of each number and look for the smallest common multiple:
10: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ...
15: 15, 30, 45, 60, 75, 90, 105, ...
25: 25, 50, 75, 100, 125, ...
The smallest common multiple of 10, 15, and 25 is 150, so your answer is correct.
4. To calculate how long Kristi exercised, we need to add the fractions: 3/5 + 1/2 + 3/4. To do this, we need to express the fractions with a common denominator. The common denominator in this case is 20, so the sum is (12/20) + (10/20) + (15/20) = 37/20, which can be simplified to 1 17/20.
5. To add 8/25 and 3/20, we need to find a common denominator. The least common multiple (LCM) of 25 and 20 is 100. Therefore, we can rewrite the fractions with the common denominator of 100: (32/100) + (15/100) = 47/100, which is your correct answer.
So, in summary, your answers are correct except for question #2, where the correct answer is 8/21.