❓ How to play
Build the number out of hundred squares, ten rods and single cubes. Drag a block in, or tap to add one; tap a block you have placed to take it away again.
Try this: It asks for 635. Put in 6 hundred squares, then 3 ten rods, then 5 single cubes.
🧠
Out of credits?Pass a quiz at 50% or better and earn 5 credits, that is what unlocks the next game.
Take a quiz →📘
Stuck on the topic?Read the step-by-step lesson first, then come back and beat the level.
Open a lesson →🎁
Playing as a guestCreate a free account to unlock levels 3 to 5, keep your progress and earn credits.
Register free →About Block Builder
Block Builder makes place value something a child can see and handle. Building a number from hundred squares, ten rods and single cubes shows pupils in Class 1–5 why the 4 in 472 is worth four hundred, and it prepares them for carrying and borrowing in column addition and subtraction.
- Place value
- Hundreds, tens and ones
- Reading three-digit numbers
For Class 1–5.