Answer:
He is wrong. The right answer is 56.35. Or 56 7/20
Step-by-step explanation:
So lets go over what we know.
The width is 5 3/4ft.
The length is 9 4/5 ft.
The square feet is l*w, otherwise known as area.
So in this, we multiply 5 3/4 by 9 4/5.
Before we multiply however, lets put this into decimal form. Its easier to think of it this way.
3/4, or 3 divided by 4, is 0.75 So 5 3/4 is actually 5.75
4/5, or 4 divided by 5, is 0.80. So 9 4/5 is actually 9.8
Now lets multiply:
5.75*9.8
This might seem a bit confusing, but here is a step by step way of how I multiplied:
5*9 is 45. 5 times 8 is 40. Move the decimal since we used 8 instead of .8 its now:
45 and 4.0
Which is 49.
Now lets multiply 9.8 by the 0.75
3/4ths of 9 is 6.75. 3/4 of 8 is 6. Again, move over the decimal since we used 8 instead of .8 its now:
6.75 and .6
This is 7.35
Add that to 49:
56.35
So this is your answer.
Now, this is not what Mr.Klimek got.
So he is wrong.
The real answer is 56.35
To find the fractional form of this, we can take the decimal 35 and put it over 100:
35/100
Then simplfy. In this case 5 goes into both numbers. So:
7/20
So we have 56 7/20.
Now, the final question, what did Mr.Klimek do wrong?
Well, he added his length and width, instead of multiplying.
We already know what our two numbers equal: 9.8 and 5.75.
Lets add these:
9 plus 5 is 14. 0.8+0.75 is 1.55.
14+1.55=15.55
Using the method of transfering fractions I spoke of above:
55/100
5 goes into both numbers:
11/20
So adding the lenght and width, we got 15 11/20. This is what Mr.Klimek did.
So to sum up each answer:
- The answer is 56.35 or 56 7/20
- Mr.Klimek is incorrect.
- Mr.Klimek added the length and Width, instead of multiplying.
Hope this helps! :D
