Another math homework question to help my son?

Question

How do you convert a whole number to multiply it by a fraction. Example: 2 x 3/5 = ?

Answer 1

2 x 2/5                first the whole number must be multiply with numerator''Up'' and when get the answer, divide with denominator''down''

the answer is 1 1/4

Answer 2

If you multiply whole number by fraction, you multiply the whole number and top number of the fraction. e.g. 2 x 3/5 = (2 x 3)/5 = 6/5

But if you have whole number that has factor with the bottom number of the fraction, then you have to divide the whole number by the factor. e.g. 3 x 5/6 (3 and 6 have the factor of 3) = (3 x 5)/(6/3) = 15/2

Answer 3

= 2/1 * 3/5

= 6/5 or 1 1/5

Answer: 6/5 or 1 1/5

Proof (returning back to 2):

= (1 1/5)/(3/5)

= (6/5)/(3/5)

= (6/5)(5/3)

= 30/15

= (30/15)/(15/15)

= 2/1 or 2

Another example:

= 2 1/3 * 3 1/2

= 7/3 * 7/2

= 49/6 or 8 1/6

Answer: 49/6 or 8 1/6

Proof (returning back to 2 1/3):

= (8 1/6)/(3 1/2)

= (49/6)/(7/2)

= (49/6)(2/7)

= 98/42

= (98/14)/(42/14)

= 7/3 or 2 1/3

Answer 4

You don't.

Simply multiply all number in numerator together, and divide by product in denominator (since 2 is a whole number it has an implied denominator of 1)

2 .. 3 .... 6

-- x -- = -----

1 .. 5 .... 5

(Note: I put in ... just to add spaces between numbers, they don't mean anything)

Answer 5

Just multiply the numerator by the numerator, and the denominator to the denominator.

In case of the problem:

2 x 3/5

2 and 3 are the numerator. Multiplying them equals 6, which makes 6 as the numerator.

5 is the denominator.

Therefore, the answer is 6/5.

To make 2 a fraction that will have the same denominator as the multiplier, multiply it by denominator/denominator. In case of the problem, the denominator of the multiplier is 5. Multiply 2 by 5/5, that is equal to 10/5.

Answer 6

2 can be 2/1. So 2/1 x 3/5 = 6/5.

The numerators are multiplied together i.e. 2 x 3 = 6

The denominators are multiplied together i.e. 1 x 5 = 5

Therefore, the answer is 6/5.

Hope that helps :)

Answer 7

When multiplying a whole number by a fraction you don't have to convert anything

2 x 3/5 = 6/5  put the 2 over 1 and multiply the top numbers together to get your new top number and multiply the bottom numbers together to get the new bottom number

if you want you can then convert 6/5 into 1 1/5

Answer 8

put the whole number over 1. then multiply across the top and across the bottom. so the solution to the example is 2/1 x 3/5 = 6/5 or 1 1/5. :]

Answer 9

Just put 2/1 then multiply across:  2/1 x 3/5 = 6/5

Hope it helped! :)