Question: Liam has $45$ crayons then she gave $7$ crayons how many that Liam crayons
1. **State the problem:** Liam starts with $45$ crayons and gives away $7$ crayons. We need to find how many crayons Liam has left.
2. **Formula used:** To find the remaining crayons, subtract the number given away from the original amount:
$$\text{Remaining crayons} = \text{Original crayons} - \text{Crayons given away}$$
3. **Substitute the values:**
$$\text{Remaining crayons} = 45 - 7$$
4. **Calculate:**
$$45 - 7 = 38$$
5. **Answer:** Liam has $38$ crayons left after giving away $7$ crayons.