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Number Line Hop

Hop along the number line to add and take away.

Who's hopping today?

🤔 How to play

  1. Pick your critter: Clover the Bunny, Pip the Frog, Plum the Baby Dino or Mango the Kitten.
  2. Pick a pond: adding or taking away, within 10 or within 20, or a mix of both.
  3. Hop and count: press Hop! once for every hop and watch the answer appear as you count on, or back.
  4. Where will you land? Tap the pad you think your critter will land on, then watch it hop to check.
  5. How far to your friend? A friend waits on a pad. Pick how many hops it takes to reach them.

On a keyboard: Enter hops, ← → and Enter choose a pad, and the number keys pick how many hops. Tap the face button to switch critters at any time. Nothing is saved, so stars reset when you leave.

What it practises

Adding and taking away within 10 and 20 on a number line: counting on, counting back and crossing ten, the step many children find hardest. Every hop draws a +1 or −1 arc, just like a number line drawn in class, so the sum and the picture match.