PSLE At first, Opal had 90 stickers and some erasers. After she gave away 71 stickers and 25% of the erasers, she had a total of 37 stickers and erasers. How many erasers did Opal give away?
|
Stickers |
Erasers |
Total |
Before |
90 |
4 u |
|
Change |
- 71 |
- 1 u |
|
After |
19 |
3 u |
37 |
25% =
25100 =
14 Number of stickers that Opal left
= 90 - 71
= 19
Number of erasers that Opal left
= 37 - 19
= 18
3 u = 18
1 u = 18 ÷ 3 = 6
Number of erasers that Opal gave away
= 1 u
= 1 x 6
= 6
Answer(s): 6