## Extend the counting sequence

Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:

## Related Lessons

• Lesson 205

Warm up with a Mystery Math Mistake to decompose teen numbers. Use a double 10-frame to represent adding three single-digit numbers. Play a game with 10-frame cards to add numbers. The one with the greatest number wins!

• Lesson 203

###### Add & Subtract Using 10

Represent 10 using a number bond and 10-frame with a missing addend. Use Notice and Wonder with a 10-frame, connecting [...]

• Lesson 301

###### Decompose/Compose Numbers Different Ways

Join Mrs. Markavich & Dotson for a Numeracy Talk with the Counting Buddy Senior, then we show you different ways to decompose and compose 2-digit numbers!

• Lesson 302

###### Comparing Numbers Different Ways

Join Mrs. Markavich & Dotson to talk about numbers with the Counting Buddy Senior! Get ready for Value Pak to show you how different ways to compare 2-digit numbers!

• Lesson 215

Join Mrs. Markavich for Numeracy Talk with Dotson working on conservation to 20. Get your math brain ready to have some fun with adding two-digit numbers.

• Lesson 213

###### Identify Tens & Ones Part 1

Join Mrs. Markavich for Numeracy Talk with Dotson working on conservation to 20. Get ready to have some fun with identifying tens and ones with Value Pak!

• Lesson 214

###### Identify Tens & Ones Part 2

Join Mrs. Markavich for Numeracy Talk with Dotson working on conservation to 20. Get your math brain ready to have some fun with identifying tens and ones with Value Pak!