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Grade 1 Math · World 2: Tens Town · Level 8

Groups of Ten

See 10, 20, 30 … 90 as one to nine tens.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

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What children learn in Level 8

  • 10 ones make 1 ten. Ten cubes snap together into one stick!
  • Count the sticks by tens: 10, 20, 30, 40. 4 tens is 40.
  • The 4 in 40 means 4 tens. The 0 means 0 ones: no single cubes.
  • The names help too: sixty is 6 tens, seventy is 7 tens, ninety is 9 tens.
  • Your turn! Build 70 with tens.
  • 10, 20, 30, all the way to 90: each is some tens and 0 ones.

Georgia's K-12 Mathematics Standards:

  • 1.NR.1.2 — Explain that the two digits of a 2-digit number represent the amounts of tens and ones.

Browse all Pre-K to Grade 5 standards →

← Level 7: A Ten and Some MoreLevel 9: Tens and Ones →