Results 1 to 3 of 3

Math Help - Primary 4 math's question 1

  1. #1
    Newbie
    Joined
    Apr 2009
    Posts
    15

    Primary 4 math's question 1

    Sack A contains 4 times as much sugar as Sack B.
    Desmond adds 0.2 kg of sugar to Sack A and 2.66 kg to sack B.
    The amounts of sugar in the two sacks are now the same.
    What was the mass of sugar in Sack B at first?
    Give your answer in kg.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member
    Joined
    Sep 2006
    Posts
    134
    Quote Originally Posted by mytan1963 View Post
    Sack A contains 4 times as much sugar as Sack B.
    Desmond adds 0.2 kg of sugar to Sack A and 2.66 kg to sack B.
    The amounts of sugar in the two sacks are now the same.
    What was the mass of sugar in Sack B at first?
    Give your answer in kg.
    A = 4B

    0.2kg + A = 2.66kg + B

    0.2kg + 4B = 2.66kg + B

    3B = 2.46

    B = 0.82kg

    A = 3.28kg
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    Joined
    Sep 2008
    From
    West Malaysia
    Posts
    1,261
    Quote Originally Posted by mytan1963 View Post
    Sack A contains 4 times as much sugar as Sack B.
    Desmond adds 0.2 kg of sugar to Sack A and 2.66 kg to sack B.
    The amounts of sugar in the two sacks are now the same.
    What was the mass of sugar in Sack B at first?
    Give your answer in kg.
    HI

    Let the mass of sugar in sack B be x kg .

    So the mass of sugar in sack A would be 4x since it's 4 times the mass of sugar in sack B.

    Now 4x+0.2=x+2.66

    3x=2.46

    x=0.82 kg
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. primary 6 math
    Posted in the Algebra Forum
    Replies: 1
    Last Post: October 6th 2010, 07:38 AM
  2. Primary 4 math's question 2
    Posted in the Algebra Forum
    Replies: 2
    Last Post: October 19th 2009, 12:39 AM
  3. Primary 5 math problem sum 1
    Posted in the Algebra Forum
    Replies: 1
    Last Post: October 11th 2009, 04:21 AM
  4. Primary 5 math problem sum 2
    Posted in the Algebra Forum
    Replies: 1
    Last Post: October 11th 2009, 04:19 AM
  5. Primary 4 math's question
    Posted in the Algebra Forum
    Replies: 2
    Last Post: July 21st 2009, 05:55 AM

Search Tags


/mathhelpforum @mathhelpforum