Related Clues:
- Sum things up
- Calculate the sum of
- Solve a KenKen puzzle, say
- Do first-grade math
- Make 4 from 2 and 2
- "This doesn't ___ up"
- Count and combine
- Make a number from 2 smaller ones
- Hit "+" on a calculator
- Combine digits
- __ insult to injury
- Make five from two and three
- Put on your friends list
- __ fuel to the fire