13. Wyatt has Croc charms. He gives half to his best friend and then his sister gave him 11 new ones. He ends up having 17 Croc Charms. How many did he have to start ? Identify the operation needed to solve this problem.
a. Subtraction and multiplication
b. Subtraction and division
c. Addition and multiplication
d. Addition and division
The correct operation needed to solve this problem is c. Addition and multiplication.
To solve the problem, we can follow these steps:
1. Let's assume the number of Croc charms Wyatt had originally is x.
2. He gives half (x/2) to his friend.
3. His sister gives him 11 new ones.
4. After these two actions, he ends up having 17 Croc charms.
5. We can express this information in the equation: x/2 + 11 = 17.
To solve this equation, we need to use addition (to add 11) and multiplication (to divide by 2).