Educator Resources for Primary Krypto

The rules of Krypto are simple: Combine five numbers using the four arithmetic operations (+, –, ×, ÷) to arrive at a target number. This online version of Primary Krypto uses the numbers 1–10 only. The game can be used to practice mental math, to introduce or review order of operations, and to foster logical thinking. While developing these skills, students will feel accomplished at having solved a math puzzle!