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Mathematics 17 Online
OpenStudy (iara_ara):

A carpenter needs to cut a long piece of lumber into smaller pieces. How many 2 1/2 foot pieces can be cut from a board that is 15 1/2 feet long? A.38 pieces with 1/4 foot left over B. 6 pieces with 1/5 foot left over D. 3 pieces with 3/5 foot left over

OpenStudy (mathmale):

Please divide 15 1/2 feet by 2 1/2 feet. This would be easier if you'd convert these measurements to 15.5 div. by 2.5, OR if you rewrite 15 1/2 as 31/2 and 2 1/2 as 5/2. Please show your work.

OpenStudy (iara_ara):

15 1/2 divided by 2 1/2 is 6 1/5

OpenStudy (mathmale):

meaning that you get six 2 1/2 foot pieces out of the board and have 1/5 foot of wood left over. Does this answer the original question?

OpenStudy (iara_ara):

your forgetting the 6 1/5

OpenStudy (iara_ara):

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OpenStudy (iara_ara):

so is it 1/5?

OpenStudy (mathmale):

Did you see the word "six" in my previous response? Does (1/5) seem to be a reasonable answer to this question?

OpenStudy (iara_ara):

Yes

OpenStudy (mathmale):

So, this person cut up a board 15 1/2 feet long and got just (1/5) from having done so? (1/5) what?

OpenStudy (mathmale):

Where does the " 6 " come into the picture?

OpenStudy (iara_ara):

Im being time and i only get 1 attempt are we right 1/5?

OpenStudy (mathmale):

NO. Sorry you're under pressure, but I will almost always emphasize understanding over speed.

OpenStudy (iara_ara):

Is it D?

OpenStudy (mathmale):

NO. Go back and re-read the original question. Please do not ask "Is it ... " again. That sounds like pure guesswork.

OpenStudy (iara_ara):

I need help i only have about 5 more minutes left in this test

OpenStudy (iara_ara):

I don't understand the equation

OpenStudy (mathmale):

Once again: You must divide 15 1/2 by 2 1/2. The answer will include both an integer and a fraction. The fraction indicates how much wood is left over. How many pieces 2 1/2 feet long can this person get out of a 15 1/2 foot long board?

OpenStudy (iara_ara):

6 1/5

OpenStudy (mathmale):

No equation here. Your task is to DIVIDE 2 1/2 into 15 1/2.

OpenStudy (iara_ara):

I did! it was 6 1/5

OpenStudy (mathmale):

What does 6 1/5 mean?

OpenStudy (mathmale):

(Reread the original question, please.)

OpenStudy (iara_ara):

I did! what did you get for the answer 15 1/2 divided by 2 1/2?

OpenStudy (mathmale):

Again I am asking you to explain what y our " 6 1/5" answer means in real life.

OpenStudy (iara_ara):

its a mixed fraction i am being timed if you know the answer just say it because i only have 2 minutes left

OpenStudy (mathmale):

You divided 15 1/2 by 2 1/2, obtaining 6 1/5. This means that you got 6 2 1/2 foot long pieces of wood and have 1/5 foot left over.

OpenStudy (iara_ara):

so is the answer B?

OpenStudy (mathmale):

Yes.

OpenStudy (iara_ara):

i have on more being timed thouhg

OpenStudy (mathmale):

As before, I emphasize understanding. I understand you're being timed, but that doesn't motivate me to rush through a problem without helping you to understand what you are doing.

OpenStudy (mathmale):

Post your new question in the "Ask a question" box, please.

OpenStudy (iara_ara):

The city council has a 7/9 acre plot of land to develop for the city. The council will use the land to make separate sections that each have an area of 1/6 for gardens. What is the greatest number of full 1/6 acre sections that can be be made from the the 7/9 acre land plot? A.1 B.3 C.4

OpenStudy (mathmale):

We're subdividing a large plot of land into many smaller plots. What are you going to try first? Think of what you did in the previous problem.

OpenStudy (mathmale):

Apply exactly the same approach here as you did back then.

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