Finding Your Way with Coordinates

Imagine you have a treasure map. Someone tells you the treasure is buried 'somewhere on the island' — not very helpful! But what if they said 'go 4 steps right, then 3 steps up'? Now you can find it exactly. That is the big idea behind coordinates. They are a pair of numbers that pinpoint any location on a grid. Think about games like Battleship or any map with a grid — coordinates are used everywhere.