PSLE At first, Emma had an equal number of purple and blue beads . She gave away
35 of her purple beads and some blue beads. In the end, she was left with
25 of her beads. What fraction of the blue beads did Emma give away?
|
Purple |
Blue |
Total |
Comparing purple beads and blue beads at first |
1x5x1 = 5 u |
1x5x1 = 5 u |
2x5x1 = 10 u |
Before |
5x1 = 5 u |
5 u |
5x2 = 10 u |
Change |
- 3x1 = - 3 u |
- 3 u |
- 2x2 = - 6 u |
After |
2x1 = 2 u |
2 u |
3x2 = 4 u |
After
2x1 =
2 u2 u
3x2 =
4 uThe number of purple beads at first is repeated. Make the number of purple beads the first the same. LCM of 5 and 1 is 5.
The total number of beads at first is repeated. Make the total number of beads at first the same. LCM of 10 and 5 is 10.
Number of blue beads that Emma was left with
= 4 u - 2 u
= 2 u
Number of blue beads that Emma gave away
= 5 u - 2 u
= 3 u
Fraction of the blue beads that Emma gave away =
35 Answer(s):
35