Number Words and Expanded Form

Read and write "four hundred six", 406, and 400 + 6.

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

What children learn in Level 13

A number can be written three ways. Here is 352, written with digits.
In words, 352 is three hundred fifty-two.
In expanded form, we stretch it out to show what each digit is worth: 300 plus 50 plus 2.
Watch out for zeros! 406 is four hundred six. There are no tens, so the expanded form is just 400 plus 6.
And 470 is four hundred seventy. That's 400 plus 70, with no ones.
Teen numbers sound tricky. 815 is eight hundred fifteen: 800 plus 15. But 850 is eight hundred fifty!

Georgia's K-12 Mathematics Standards:

2.NR.1.1 — Explain the value of a three-digit number using hundreds, tens, and ones in a variety of ways.
2.NR.1.3 — Represent, compare, and order whole numbers to 1000 with an emphasis on place value and equality. Use >, =, and < symbols to record the results of comparisons.