Lesson 5 of 29
Chapter 1•interactive•30 min10 XP
Count One to Hundred
Introduction
Master counting all the way to 100 — a major milestone in early mathematics.
1
The Hundred Chart
A hundred chart shows all numbers from 1 to 100 arranged in a 10×10 grid. Each row contains one group of ten. Patterns become visible: even numbers end in 0, 2, 4, 6, 8; multiples of 5 end in 0 or 5; multiples of 10 end the rows. These patterns are the beginning of number theory.
Quick practice
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Quick warm-up: what is 4 + 3?
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