PSLE At first, Roshel had an equal number of gold and red marbles . She gave away
34 of her gold marbles and some red marbles. In the end, she was left with
14 of her marbles. What fraction of the red marbles did Roshel give away?
|
Gold |
Red |
Total |
Comparing gold marbles and red marbles at first |
1x4x1 = 4 u |
1x4x1 = 4 u |
2x4x1 = 8 u |
Before |
4x1 = 4 u |
4 u |
4x2 = 8 u |
Change |
- 3x1 = - 3 u |
- 3 u |
- 1x2 = - 6 u |
After |
1x1 = 1 u |
1 u |
3x2 = 2 u |
After
1x1 =
1 u1 u
3x2 =
2 uThe number of gold marbles at first is repeated. Make the number of gold marbles the first the same. LCM of 4 and 1 is 4.
The total number of marbles at first is repeated. Make the total number of marbles at first the same. LCM of 8 and 4 is 8.
Number of red marbles that Roshel was left with
= 2 u - 1 u
= 1 u
Number of red marbles that Roshel gave away
= 4 u - 1 u
= 3 u
Fraction of the red marbles that Roshel gave away =
34 Answer(s):
34