Before adding one through five, students need to know which foundational skill?

• A. How to count and have an understanding of number sense.
• B. How to write cursive.
• C. How to memorize lists.
• D. How to use a calculator.

Answer: (A)

Counting and number sense teach students that numbers represent quantities and that you can determine how many by counting objects. Before adding one through five, kids need to count reliably, understand one-to-one correspondence, and recognize how quantities combine. This lets them see that two items plus three items make five, by physically combining groups and confirming the total. It also supports quick recognition of small quantities (subitizing) and the idea that numbers reflect amounts, which is essential for adding any small set. Writing cursive, memorizing lists, or using a calculator don’t establish this connection between quantity and numerals, so they aren’t the foundational skill for early addition.