PSLE At first, Emma had an equal number of orange and yellow marbles . She gave away
35 of her orange marbles and some yellow marbles. In the end, she was left with
23 of her marbles. What fraction of the yellow marbles did Emma give away?
|
Orange |
Yellow |
Total |
Comparing orange marbles and yellow 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 |
After
2x3 =
6 u14 u
1x10 =
20 uThe number of orange marbles at first is repeated. Make the number of orange 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 yellow marbles that Emma was left with
= 20 u - 6 u
= 14 u
Number of yellow marbles that Emma gave away
= 15 u - 14 u
= 1 u
Fraction of the yellow marbles that Emma gave away =
115 Answer(s):
115