Related Clues:

• Do some simple math
• Perform a math operation
• 2 + 2, e.g
• Make a sum
• Put a couple of things together
• Create sums
• Simple arithmetic function
• Come up with sum-thing?
• Do "sum" easy math
• Find the 64 Across
• Change two fives into a ten?
• Stir in, e.g
• Chime in with
• Count these with those
• Do kindergarten math