CVV stands for card verification value. It’s a three- or four-digit number found on most debit and credit cards. There are several other acronyms for this security feature within the industry.

When you add a 1-digit number to a 3-digit number, the same rules apply as when you are adding a 1-digit number to a 1 or 2-digit number. Number lines, partitioning, Base 10 and the column method ...

Write the numbers in a vertical list, lining up the unit digits ... Write 0 above the 3 and carry the 3 to the next digit (5) to give 35. 35 ÷ 7 is 5 remainder 0. Write 5 about the 5.