Count on by 1s — Fill in the missing numbers.
Read the number word. Write the numeral.
Write the number word. (Remember: no "and" — we say "one hundred two.")
Estimate First! Think about the number line from 100 to 110. Don't count — just picture it!
Is 102 closer to 100 or 110?
Is 109 closer to 100 or 110?
Number Talk — Aria says the number after 109 is 110. Ben says it is 200. Who is right? Explain WITHOUT counting all the way from 1.