These exercises ask you to add up notes and coins and give the final total in a simplified form. The key idea is to convert every item into value, then combine the amounts in the same unit.
Look at the notes and coins one by one. Write down each value clearly so you do not miss any item.
A helpful method is to group the same kind of money together first. For example, count all notes of one type, then all coins of one type, and then combine everything.
Add the values carefully. If the money uses different units, make sure you are working in the same unit before adding. Keep your work neat so the total is easy to follow.
Write the total in its simplest form. If the exercise expects a single total amount, make sure your result is fully combined and not left as separate parts.
Recount the items once more and verify that your total matches the sum of all notes and coins. A good check is to count in a second way, such as grouping by denomination, to see whether you get the same answer.
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