Join Mrs. Markavich for a missing addend word problem with Professor Barble! Next look out for two of favorite Math Might friends D.C. and Value Pak as they help use learn to add two-digit number ...

For the operation, add two numbers in the usual way and then divide by 6, ignoring the quotient but retaining the remainder. So 3 and 5 deliver 2, since 8 leaves a remainder of 2 when divided by 6.