math

what is an eay way to add 1/5 1/2 and 1/7. I have to find a number that they all go into for a similar denominator right? but how do I do that without taking forever.

Multiply the denominators:

5 x 2 x 7 = ??

=)

As Writeacher has noted, the common denominator is 70 in this case. Convert each fraction to the equivalent value with 70 as the denominagtr, and add them.
1/5 = 14/70
1/2 = 35/70
1/7 = 10/70

  1. 👍 0
  2. 👎 0
  3. 👁 54

Respond to this Question

First Name

Your Response

Similar Questions

  1. 6th grade math

    I still do not understand this problem? find a number such that when added to the numerator and denominator of 2/11 yields a fraction equivalent to 1/2? thanks If you add 7 to the numerator and 7 to the denominator you get 9/18.

    asked by vince on March 8, 2007
  2. Calculus

    a(t)=4sin3t;v(0)=1,s(0)=6 I'm trying to find expression for s(t). Should I wait till the end to add find and add constant. I got [1/9(13t-4sin(3t))+6] and it was wrong.

    asked by Anon on April 24, 2016
  3. Math

    Simplify the following by collecting like terms:- 2y add 3x add 7y - x equals Sorry cant find mathematical signs.

    asked by Jasmin Z on August 20, 2017
  4. math

    1/3+5/12+4/5= how do I break this down to add it? 1/3 5/12 4/5 find a common denominator, which for example, would be 60. 1/3= 20/60 5/12= 25/60 4/5= 48/60 then add the numerators. 20/60 + 25/60 + 48/60 = ?

    asked by patti help on March 2, 2007
  5. math

    I have a couple of math questions that i cant seem to get to work out. can someone help me please.? 1.) (x/x+6)-(6/x-6)=(x^2+36)/(x^2-36) 2.) (r-2)-(2-r)=0 3.) add (8/ty^2)+(9/t^2y) 4.)add (7/w)+(8/w^2) 5.)add

    asked by jen on March 10, 2010
  6. bartlett hill,math

    add the like terms together.a+b+a+2b Okay. Well, the questoin says to add the like terms together, that means add the A's together and add the B's together. a+b+a+2b Alright, so your a's and your first b don't have a number in

    asked by kadeisha on April 26, 2007
  7. math

    sabrina used a calcutator and started adding the whole numbers in order 1+2+3+4+5+..... what is the last number she would add that would get the sum on her calculator over 1000? Try it yourself. You'll be surprised that it won't

    asked by ciera on January 23, 2007
  8. Chemistry

    Describe in detail how you would make one molar solution of sodium chloride. Do I add the atomic masses of Na and Cl and then find the mols? And the after that you would just add 1L of water, correct?

    asked by ~Brittney~ on August 28, 2007
  9. chemistry

    to complex ( K2[Cu(C2O4)2]H2O, add 1 com of dil. H2SO4. Add KI; then add 1-2cm3 choloform and shake gently. what are the observations.

    asked by jamie on April 3, 2016
  10. math

    NUMBER SEQUENCES identify the sequence as arithmetic, geometric, both, or neither. 1. 7, 9, 11, 13,... arithmetic**** geometric both neither 2. 2, 1, 1/2, 1/4,... arithmetic geometric**** both neither write a rule for the sequence

    asked by mjc_177 on March 5, 2019

More Similar Questions