Place-Value Blocks

Tap or drag blocks onto the mat; tap a block to take it away.

Grade

Question1/ 8Right0

Your stars

Tens and ones Grade 1—
Hundreds Grade 2—
Thousands Grade 3—
Expanded form Grade 3—
Millions Grade 5—
Rounding Grade 5—

Seven of eight earns the star. Stars are saved on this device.

Remember

1,000100101

Ten ones make a ten. Ten tens make a hundred. Ten hundreds make a thousand. The place of a digit tells you what it is worth.

Big numbers come in groups of three places: ones, thousands, millions. A comma marks each group: 3,615,204. To round, look at the next digit to the right: 5 or more rounds up.