Secret Code Addition with Reptiles and Amphibians — Grade 1

Crack the code by adding. Each of the reptiles in the legend stands for a number, and each row of this sheet lines up three or more of them to add. The child decodes the pictures into numbers, then finds the sum — substitution and addition in one task. Adding three or more numbers is what makes this Grade 1 rather than kindergarten, and keeping every total within twenty means a child can still check the answer by counting.

Looking up each picture's value and then adding three or more of them rehearses both careful reading and multi-number addition at once. For a Grade 1 child that combination builds real confidence with small sums, and holding every total within twenty keeps the work honest — a child can always count the decoded numbers to check the answer rather than guess it, then move on to the next coded row.

Children who like reptiles and amphibians treat each row as a small puzzle, which keeps a code-breaker happily adding. When this feels easy, crack the code in secret code addition with shapes, or try secret code addition with valentine pictures (black & white). You can also browse every secret code addition worksheet or the whole reptiles collection for grade 1 — each sheet prints cleanly or plays online for free.