PSLE At first, Abi had an equal number of yellow and blue marbles . She gave away
35 of her yellow marbles and some blue marbles. In the end, she was left with
25 of her marbles. What fraction of the blue marbles did Abi give away?
|
Yellow |
Blue |
Total |
Comparing yellow marbles and blue marbles 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 yellow marbles at first is repeated. Make the number of yellow 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 5 is 10.
Number of blue marbles that Abi was left with
= 4 u - 2 u
= 2 u
Number of blue marbles that Abi gave away
= 5 u - 2 u
= 3 u
Fraction of the blue marbles that Abi gave away =
35 Answer(s):
35