Let's solve the expression step by step:

$223 - 1.25 + 56$

1. First, subtract $1.25$ from $223$:

$223 - 1.25 = 221.75$

2. Then, add $56$ to $221.75$:

$221.75 + 56 = 277.75$

So, the result of the expression is $\boxed{277.75}$.

Would you like more details or have any questions? Here are five related questions to consider:

1. How would you solve the expression if it included multiplication or division?
2. What is the result of $223 - (1.25 + 56)$?
3. How do you handle negative numbers in similar expressions?
4. What happens if you round the final answer to the nearest whole number?
5. Can you solve the expression $223 - 1.25 \times 56$?

Tip: When solving an expression, it's helpful to follow the order of operations carefully, even if it seems straightforward.