To find the amount of money Sadie has left after her transactions, you can start with how much she had initially, add the money she received from her grandparents, and then subtract the amount she spent.
- Start with the amount she already had: $36
- Add the birthday money: $36 + $50
- Subtract the amount spent: ($36 + $50) - $10
So the expression that tells you the amount of money Sadie has left is:
\[ (36 + 50) - 10 \]
This simplifies to:
\[ 86 - 10 \]
Therefore, Sadie has $76 left after her transactions.