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# Need homework help please??

Trying to help my daughter with homework. How do you add / subtract a fraction if one of the fractions is a whole number? For example

7
- 4 3/4
------------- Thank you ladies!!!

Asked by WifeyandMom71 at 6:11 PM on Mar. 16, 2011 in

Level 12 (749 Credits)
• The answer is 2 1/4.
Take 1 away from 7 and turn it into a fraction example: 1= 4/4

Original
7
- 4 3/4
-----------
2 1/4

Transformed

6 4/4
-4 3/4
----------
2 1/4

to check it, just add 2 1/4 + 4 3/4 or 2.25 + 4.75

I hope I've helped

Answer by Alexias30 at 6:27 PM on Mar. 16, 2011

• Okay, your 7 becomes a 6 and 4/4 (which is the same as 7). Then you subtract the fractions top numbers only (numerators) and leave the bottom number (denominator) the same. Then you subtract your whole numbers.

Answer by scout_mom at 6:19 PM on Mar. 16, 2011

• http://www.math.com/school/subject1/lessons/S1U4L6DP.html  This site give step by step instructions on how to add and subtract them

Answer by vbruno at 6:13 PM on Mar. 16, 2011

• You need to put both numbers into fractions. So, since the denominator is 4 in your example, you need to make the equation read:

28/4 - 15/4.

(because 28/4 = 7, and 19/4 = 4 3/4)

Once you have all the numbers in the same format, you can subtract the numbers on top, with the bottom numbers remaining the same (so, the answer then is 9/4). Then, you can put 9/4 into a whole number form: 2 1/4.

Answer by evwsquared at 6:23 PM on Mar. 16, 2011

• that 3 3/4 i think lol its been way to long and never was good with fractions

Answer by myboysRmyhero at 6:13 PM on Mar. 16, 2011

• Thanks. Trying to find if they show you if one of the numbers is a whole number, but i dont see that there.

Comment by WifeyandMom71 (original poster) at 6:16 PM on Mar. 16, 2011

• umm yeah i forgot about fractions a long time ago :P

Answer by MoonPixie at 6:17 PM on Mar. 16, 2011

• One way is to make all the numbers into fractions with the same denominator:
7 = 28/4
-4 3/4 = -(16/4 + 3/4 )

28/4 - (16/4 + 3/4) = 28/4 - 19/4 = 9/4 = 2 1/4

Answer by TweenAndTwinMom at 6:19 PM on Mar. 16, 2011

• scout Mom, thank you!! that was easy, and i know you got it right, because they have the answers, we just didnt know how to solve it. SO a 7 is 6 and 4/4. A 5 would be 4 and 4/4?? and so on?

Comment by WifeyandMom71 (original poster) at 6:23 PM on Mar. 16, 2011

• I'm going to argue against putting it in the format of 6 4/4, because for other types of math problems, she's going to have to put the whole number into a fraction, like in my example, so she should get used to thinking of whole numbers as fractions in that way.

Answer by evwsquared at 6:25 PM on Mar. 16, 2011

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