##
Primary Krypto

**Grade:**
PreK to 2nd, 3rd to 5th, 6th to 8th

The rules of Krypto are simple: Combine five
number cards using the four arithmetic operations (+, –, ×, ÷) to arrive at a
"target" number. This online version of Primary Krypto uses the numbers 1–10
only.

- Drag-and-drop the number cards onto the game
board. They will snap into place on the outlined squares. From the small
squares, choose which operation is to be performed.
- The three buttons are used to control the game:
**deal** - get a new set of number cards and a new target number
**hint** - for the current hand, reveal one possible set of operations
that yield a solution
**solve** - see our solution (though not necessarily the only solution)

- Click
**deal** to generate a set of number
cards and a target number. Find a solution for the puzzle. Then, click the **hint** button if you did not find our solution. Can you find a solution
that uses the operations in the order supplied by the hint?
- What problem-solving strategies can be used while playing Primary Krypto?

**NCTM Standards and Expectations**