Hundred Chart
About this app
A friendly marker chip hops across the hundred chart: +1 jumps one column right, +10 one row down — the column stays the same. The number cross shows every number's ±1 and ±10 neighbors with arrows, color buttons make the 2s, 5s, 10s and 11s rows light up live as stripes and a diagonal, and children paint their own patterns with free colors. This reveals that the chart is not just a list of numbers: position encodes place value — row = tens, column = ones.
Understanding the hundred chart
A hundred chart arranges the numbers 1 to 100 in ten rows of ten. That gives every position a meaning: one step right is +1, one step down is +10. Each column holds numbers with the same ones digit, such as 7, 17, 27 up to 97, and numbers in the same row mostly share the same tens. Place value becomes visible, and children can move around the numbers to 100 instead of counting one by one.
What the app shows
There are three modes. In “Jump”, a marker hops forwards and backwards across the chart with buttons for tens and ones. The “Cross” shows the neighbours above, below, left and right of a tapped number, that is ±1 and ±10. In “Colour”, buttons light up the multiples of 2, 5, 10 and 11, and your child can paint freely with their own colour. Optionally the app gives tasks such as “Find 47”.
Spotting patterns
Multiples of 5 form two stripes, multiples of 10 fill the last column, and multiples of 11 make a diagonal staircase because +11 is +10 and +1. Ask your child where a number must be before they tap it: “63 is below 53, so where is it?” The cross works well for questions like “Which number is above 48?”.
Frequently asked questions
- How can I help my child with numbers to 100?
- Orientation tasks on a hundred chart work well: find numbers, name neighbours, jump by +10 and −10. Combine them with a number line and base-ten blocks so the value of tens and ones becomes concrete.
- Why are 7, 17 and 27 in the same column?
- Each row has ten places, so moving down one row adds exactly 10. The tens digit changes while the ones digit stays the same, which is why all numbers with the same ones digit line up in one column.
- What patterns can you find on a hundred chart?
- Multiples of 2 fill every other column, multiples of 5 form two columns, multiples of 10 the last column, and multiples of 11 a diagonal. Colouring times tables on the chart turns them into visible patterns.
- What can my child do with this hundred chart?
- Your child jumps across the chart in tens and ones, views the neighbours of any number, colours times table patterns and paints their own designs. Optional find-the-number tasks are read aloud.
Subject: Elementary · Maths
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