Two Ways to See a Number

See 33 as 3 tens and 3 ones, and as 33 ones.

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

What children learn in Level 10

33 is 3 tens and 3 ones. But every ten is made of 10 ones!
So 33 is also 33 ones: 10, 20, 30 ones in the sticks, and 3 more. It's the same amount, counted two ways.
Your turn! Here are 1 ten and 12 loose ones. Tap 10 of the ones to snap them into a new ten.
Now it's 2 tens and 2 ones: 22. Making a ten didn't change the amount, just how it's grouped.
A ten can be a bundle of 10 straws, 10 pennies in a pile, or a stick of 10 cubes. It's always 10 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.