PSLE At first, Nora had an equal number of black and green beads . She gave away
34 of her black beads and some green beads. In the end, she was left with
35 of her beads. What fraction of the green beads did Nora give away?
|
Black |
Green |
Total |
Comparing black beads and green beads at first |
1x4x5 = 20 u |
1x4x5 = 20 u |
2x4x5 = 40 u |
Before |
4x5 = 20 u |
20 u |
5x8 = 40 u |
Change |
- 3x5 = - 15 u |
- 1 u |
- 3x8 = - 16 u |
After |
1x5 = 5 u |
19 u |
2x8 = 24 u |
After
1x5 =
5 u19 u
2x8 =
24 uThe number of black beads at first is repeated. Make the number of black 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 5 is 40.
Number of green beads that Nora was left with
= 24 u - 5 u
= 19 u
Number of green beads that Nora gave away
= 20 u - 19 u
= 1 u
Fraction of the green beads that Nora gave away =
120 Answer(s):
120