Classroom tools
Place value counters
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Tap a column to add a counter and tap a counter to take it away. Drag a counter into the next column to exchange it (1 hundred for 10 tens, or 10 tens for 1 hundred).
About these online place value counters
Place value counters help children see what each digit in a number is worth, and what really happens when we exchange ten ones for a ten. This free interactive version works on whiteboards, laptops and tablets. Choose any columns from millions down to thousandths, build numbers by tapping, drag counters across to exchange, type in a number or make a random one, show it the usual way or another way (such as 3 hundreds and 18 tens), and hide the total while the class works it out.