lesson
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Imagine a big game board that holds every single number from 1 to 100 in neat, tidy squares.
This special grid is called a hundred chart, and it is packed with secret number paths waiting to be explored.
📊Interactive visual of a full 10x10 hundred chart from 1 to 100. Clean light theme with white background, #1e2945 dark blue text, soft rounded tiles (#f1f5f9) with numbers 1 to 100 neatly arranged in 10 rows and 10 columns. Top header says 'The Hundred Chart'. Subtle gentle pulse animation on the whole grid to invite exploration.
What happens if we take a stroll straight across from left to right?
Walking Across Rows
A row is a line of numbers that goes straight across from left to right.
Every time you step one square to the right in a row, you add 1 to your number.
📊A visual focus on row 4 of a hundred chart (numbers 31 to 40). The rest of the chart is faded in light gray. Row 4 is highlighted in bright sunny yellow (#fef08a). Animated curved arrows hop from 31 to 32 to 33 up to 40, each with a '+1' badge above it. The ones digit in each number is highlighted in bold blue to show it counts up: 1, 2, 3, 4, 5, 6, 7, 8, 9, then resets at 40.
Sideways steps change numbers by 1. But what happens if we drop straight down instead?
Sliding Down Columns
A column is a line of numbers that goes straight up and down like a tall building.
Every time you move down one square in a column, you add 10 to your number.
📊A visual diagram showing column 4 highlighted on the hundred chart: 4, 14, 24, 34, 44, 54, 64, 74, 84, 94. The rest of the chart is faded. Vertical downward arrows point from each number to the one below it, marked '+10'. The tens digits (1, 2, 3, 4, 5, 6, 7, 8, 9) glow in orange, while all ones digits stay firmly as a blue '4' to show the ones place does not change.