Related Clues:
- Sum; attach (to)
- Use a + sign
- Put on extended promotion
- Total up some numbers
- Verb indicated by +
- Verb on a dipstick
- Opposite of take off
- Perform a simple operation?
- Solve KenKen, say
- Compute a sum
- Work out a sum
- Do some basic arithmetic
- Join in broad daylight
- Put three and eight together
- Obey a plus sign