Do you think you can sink the other player's battleship?
Get a partner, build a number in your battleship, GO!
Ask your partner if they have a number in a place value spot. For example, "Do you have a 4 in the hundreds place?"
If yes, you sank that battleship, write a four in the hundreds place for "THEIR BATTLESHIP" If no, the partner tells you whether their number is higher or lower than that four.
You keep going until someone figures out all the numbers in the place value battleship.
This document is editable if you need to add place values, subtract, or add decimals.