Answer :

To determine what you need to add to 3.56 to make 4, follow these steps:

1. Identify the target number we want to achieve, which is 4.
2. Identify the current number we have, which is 3.56.
3. Calculate the difference between the target number and the current number.

Let's break it down step by step:

- Start with the target number: 4.
- Subtract the current number from the target number:
[tex]\( 4 - 3.56 = ? \)[/tex]

When you perform this subtraction, you get:

[tex]\( 4 - 3.56 = 0.43999999999999995 \)[/tex]

Therefore, to make 4 from 3.56, you need to add approximately 0.44.