PSLE At first, Jen had an equal number of silver and black beads . She gave away
34 of her silver beads and some black beads. In the end, she was left with
14 of her beads. What fraction of the black beads did Jen give away?
|
Silver |
Black |
Total |
Comparing silver beads and black beads 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 silver beads at first is repeated. Make the number of silver beads the first the same. LCM of 4 and 1 is 4.
The total number of beads at first is repeated. Make the total number of beads at first the same. LCM of 8 and 4 is 8.
Number of black beads that Jen was left with
= 2 u - 1 u
= 1 u
Number of black beads that Jen gave away
= 4 u - 1 u
= 3 u
Fraction of the black beads that Jen gave away =
34 Answer(s):
34