Riya collected shells and her brother gave her more shells. How many shells does she have now?
Answer
shells
The correct answer is shells — State the total number of shells Riya now has: shells.
Step-by-step solution
- Identify the two numbers of shells: and .
- Add the numbers: .
- State the total number of shells Riya now has: shells.
Common mistake: Adding and incorrectly (e.g., writing ).
Concept tested: Counting objects and simple addition
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