lesson
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What happens if you color in squares while skipping across a grid of 100 numbers? You get secret stripe patterns that help you count super fast!
A hundred chart is a big grid with numbers from 1 to 100 arranged in 10 rows of 10.
Because each row has exactly 10 squares, numbers that share digits line up in neat columns.
📊A clean, colorful 10x10 hundred chart showing numbers 1 to 100. The numbers 1 through 10 are in the top row, down to 91 through 100 in the bottom row. Neutral light gray grid squares (#f1f5f9) with crisp dark text (#1e2945). A friendly frog marker sits at the start, looking ready to hop.
Let's see what happens when we make big hops of ten all the way to one hundred.
Counting by Tens
When you skip-count by tens, you add 10 each time: 10, 20, 30, 40, and so on.
On a hundred chart, counting by tens makes one straight vertical line down the very right edge!
📊A 10x10 hundred chart where the entire 10th column (10, 20, 30, 40, 50, 60, 70, 80, 90, 100) is highlighted in vibrant orange (#ff9800) with bold white numbers. Animated hop arrows show a jump from 10 down to 20, down to 30. A callout bubble says: 'Every hop lands in the last column!'
Tens make one straight column. What kind of pattern appears if we take smaller hops of five?
Counting by Fives
When you skip-count by fives, every number ends in either a 5 or a 0.
This creates two colorful vertical stripes on your chart: the middle column and the end column.