Some math problems I need help on?

Question

Multiply (enter as improper fraction)
At 6 1/2cent per pound of string beans, how much does 7 pounds cost?
____ Cents


Multiply
The Owens Chemical Co. made a shipment of 450 cartons. Each carton weighed ½ pound. What was the total weight of the shipment?
_____ Pounds


Multiply
If Mr. Henry gives 1/10 of his salary to charity, how much does he give if his salary is $600 per month?
_____ Dollars


Multiply (enter as an improper fraction)
The Southside Band marches 1 ¾ miles in an hour in a parade. How far can they march in 5 hours?
____ Miles


Multiply
The carton of milk in the refrigerator has ¾ of a quart left. John drinks ½ of this milk. How much does he drink?
____ Quart


I have tried all them and get them wrong...the teacher does not help much.

Thank you both. I just found out there is alot of problems I missed...not to try and persuade you both but I am going to have to ask more questions...and help=points...again not trying to say anything...just pointing it out :)

Answer 1

All of these problems require the same knowledge. A fraction is simply the portion of a whole number. Here is the logic you need for it: For example... 6 1/2 To convert this to an improper fraction, you can change the 6 portion to a fraction. 6/1. Then, you have to remember, when adding fractions, you must use the least common denominator. To get that, for equation 1, multiply the 6/1 by 2/2. = 12/2. Now, you get 12/2 +1/2=13/2. Any number divided by 1 is itself, so when you are multiplying by a whole number not written as a fraction, you can put it as /1. Then just multiply the top by the top, and the bottom by the bottom, and divide your result out.

1) 6 1/2 is equal to 13/2 (6*2=12+1). Multiply 13/2 by 7/1 = 91/2 = 45.5 cents.

2) 450/1 *1/2 = 450/2 = 225 lbs.

3) 1/10 * 600/1 = 600/10 = $60

4)7/4*5/1= 35/4=8.75 miles.

5) 3/4 *1/2=3/8 of a quart.

I hope this helps!

Answer 2

(1) 1 pound of beans = 6 1/2 c
7 pounds of beans = 13/2 x 7 = 91/2 c (as improper fraction)

(2) 1 carton = 1/2 pound
450 cartons = 1/2 x 450 = 225 pounds

(3) 1/10 of salary = 1/10 x 600 = $60 per month to charity

(4)1 hour => 1 3/4 miles
5 hours => 1 3/4 x 5 = 35/4 miles (as improper fraction)

(5) Amount John drinks = 1/2 x 3/4 = 3/8 quarts

Hope this helps.

Answer 3

1. 6 1/2 x 7 = 42 7/2=.451/2 2. 450 x 1/2 = 225 lbs. 3. $600 x 1/10 = 600/10 =$60.00 4. 1 3/4 x 5=7/4 x 5/1=35/4=8 3/4.miles. 5. 3/4 div. 1/2 = 3/4 div 2/1=6/4 =1 1/2 . I think these are right but, got a little confussed on the last one.did you know you can go to www.studybuddy.com to get help with your homework. It is a great site.

Answer 4

1. 6.5*7=45.5 cents
2. (1/2)*450=225 pounds
3. (1/10)*600=60 dollars
4. 1 and 3/4 = 7/4, so (7/4)*5=35/4=8.75 miles
5. (3/4)*(1/2)=0.375 quarts