2.75+.003+.158=

Line up the decimal points and add them. Write 2.75 as 2.750 if it helps.

2.661

To find the sum of 2.75, 0.003, and 0.158, you can follow these steps:

1. Start by aligning the decimal points of the numbers.
2. Add the numbers together, starting from the rightmost column (the ones column) and working your way to the left.
- Add the digits in the ones column: 5 + 3 + 8 = 16. Write down the 6 and carry over the 1 to the next column.
- Add the digits in the tenths column: 7 + 0 + 5 (from the carried over 1) = 12. Write down the 2 and carry over the 1 to the next column.
- Add the digits in the hundredths column: 2 + 0 + 1 (from the carried over 1) = 3.
3. Combine the digits from step 2 to get the final sum.
- The final sum is 3.031.

So, 2.75 + 0.003 + 0.158 = 3.031.