Hundreds chart
Tap a square to colour it in.
Hundreds chartstringmash.com/hundreds-chart
Using the chart
Pick the numbers, then what to show. Every number gives the full chart. Missing numbers blanks three squares in each row for a child to fill in, and New gaps deals a fresh set. A blank grid is for writing the whole chart out by hand.
Skip count by lights up every 2nd, 5th or 10th number, or any count up to 12, and 25. Tap squares to colour your own pattern. Whatever is on screen is what prints, colours and all, in grey.
100, 120 or 0 to 99?
The 1 to 100 chart is the classic. In the US, kindergarten children learn to count to 100 by ones and by tens, and this is the chart for it.
The 120 chart carries on two more rows. It matches the first-grade goal to count to 120, starting at any number less than 120. Crossing 100 is where children often slip. After 109 comes 110, not 200.
The 0 to 99 chart starts at zero. Each row then shares a tens digit, so 30 to 39 sit together. Some teachers prefer it for place value for that reason.
Patterns to look for
One step right adds 1. One step down adds 10. So 34 sits under 24 and above 44, and every column ends in the same digit.
The diagonals are less obvious. Down and to the right adds 11, because it is one down and one across. Down and to the left adds 9. Ask a child to predict the next square before they look.
Skip counting makes shapes. Light up 5s and you get two straight columns. 9s run in a slanted line, and 3s make diagonal stripes. Try 4s and 6s and see which numbers both of them land on.
Games and activities
Print a full chart and cut it into jigsaw pieces along the lines. Putting it back together means knowing what comes above and below each number.
Play mystery number. Think of a square and give clues: it's one more than 46, it's in the row below 38. On a missing numbers sheet, ask which gap is the biggest number, then fill them all in.
For adding, start on a number and count on with steps. To add 23 to 41, go down two rows and right three. Children see that tens and ones move separately.
Questions
Is the chart free to print?
Yes. Print as many as you like for a class or at home.
Why is 100 in the last column and not the first?
Each row holds ten numbers, starting from 1. So 91 to 100 is the tenth row and 100 sits under 90. On the 0 to 99 chart every row starts with a new tens digit instead.
How do I print the gaps without the numbers showing through?
Choose Missing numbers. The gaps print as empty boxes, and New gaps gives a different sheet.
Can I print the coloured squares?
Yes. Lit and tapped squares print in grey, so a pattern shows up on a black-and-white printer.
Sources
- Common Core State Standards, Kindergarten: Counting and Cardinality
- Common Core State Standards, Grade 1: Number and Operations in Base Ten
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