PSLE At first, Risa had an equal number of blue and green marbles . She gave away
35 of her blue marbles and some green marbles. In the end, she was left with
23 of her marbles. What fraction of the green marbles was Risa left with?
|
Blue |
Green |
Total |
Comparing blue marbles and green marbles at first |
1x5x3 = 15 u |
1x5x3 = 15 u |
2x5x3 = 30 u |
Before |
5x3 = 15 u |
15 u |
3x10 = 30 u |
Change |
- 3x3 = - 9 u |
- 1 u |
- 2x10 = - 10 u |
After |
2x3 = 6 u |
14 u |
1x10 = 20 u |
The number of blue marbles at first is repeated. Make the number of blue marbles the first the same. LCM of 5 and 1 is 5.
The total number of marbles at first is repeated. Make the total number of marbles at first the same. LCM of 10 and 3 is 30.
Number of green marbles that Risa was left with
= 20 u - 6 u
= 14 u
Fraction of the green marbles that Risa was left with =
1415 Answer(s):
1415