Loona Hundreds Chart — Explore the Numbers 1 to 100
The hundreds chart is where number patterns become visible: columns of multiples, diagonal neighbours, the +10 jump straight down. Highlighting turns those patterns on like lights, and missing-number mode turns the chart into a self-checking exercise.
In Missing numbers mode, click a blank square on screen to peek at its number.
How to Use It
- Choose a mode: full chart, even/odd highlighting, multiples highlighting, or missing-numbers practice.
- For multiples, type the multiple (2–12) and watch its column pattern light up — the fastest way to see why the 5s end in 5 and 0.
- Missing numbers: 20 squares hide their numbers. Students reason from neighbours (one more, one less, ten more) and click to check themselves.
- Print any view — the full chart for the wall, or missing-numbers for a worksheet (answers are one click away on screen, hidden on paper).
How It Works
The chart is a strict 10-by-10 layout of 1–100, so moving right adds 1 and moving down adds 10 — the two facts that make the patterns work. Highlighting is computed per number (divisibility for multiples, parity for even/odd), and practice mode hides a random set of 20 numbers whose values are kept for the click-to-peek check.
Frequently Asked Questions
Why do the multiples of 5 make two straight columns?
Because 5 divides 10 exactly twice: every second row lands on the same two columns, ending in 5 and 0. Try multiples of 2, 10 and 3 to compare — 3 makes diagonals instead, because 10 is not a multiple of 3.
What age is the hundreds chart for?
Ages 5–9 mainly: counting, skip counting, place value and early multiplication patterns all live on this grid.
Does the missing-numbers mode print the answers?
No — printed sheets show question marks, so it works as a real worksheet. On screen, clicking a hidden square reveals its number for self-checking.