PSLE Sam had $21 more than Erika at first. After Sam gave some of his money to Erika, he had $81 less than Erika. How much money did Sam give to Erika?
|
Sam |
Erika |
Before |
1 u + 30 + 21 = 1 u + 51 |
1 u + 30
|
Change |
- 51 |
+ 51 |
After |
1 u |
1 u + 30 + 51 = 1 u + 81 |
At first, Sam had $21 more than Erika. After giving to Erika, he had $81 less than Erika. This means he gave Erika more than $21.
Additional amount that Sam gave to Erika
= (81 - 21) ÷ 2
= 60 ÷ 2
= $30
Total amount that Sam gave to Erika
= 30 + 21
= $51
Answer(s): $51