4+4 5+5 5:1

The expressions you've presented can be evaluated individually:

1. \( 4 + 4 = 8 \)
2. \( 5 + 5 = 10 \)
3. The expression \( 5:1 \) is equivalent to \( \frac{5}{1} = 5 \)

So, the results are:

• \( 4 + 4 = 8 \)
• \( 5 + 5 = 10 \)
• \( 5:1 = 5 \)

If you need further assistance or a different type of calculation, please let me know!