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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!!!

 
WifeyandMom71

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

Level 12 (749 Credits)
This question is closed.
Answers (11)
  • 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
    Alexias30

    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.

    scout_mom

    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

    vbruno

    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.
    evwsquared

    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
    myboysRmyhero

    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.
    WifeyandMom71

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

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

    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
    TweenAndTwinMom

    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?
    WifeyandMom71

    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.
    evwsquared

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

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