WorksheetsAbout this worksheet
A ten by ten grid of numbers with some left out. Filling it teaches the order of numbers and the pattern behind them: going one square right adds 1, going one square down adds 10.
What this skill is
A hundred chart sets out a hundred numbers in ten rows of ten. Because each row holds exactly ten numbers, the chart shows the tens and ones of our number system as a picture: every number in a column ends in the same digit, and every number in a row, except the last, starts with the same tens digit.
A worked example
Find 47 on a full chart from 1 to 100. It is in the fifth row, seventh square.
- One square to the right is 48: one more.
- One square to the left is 46: one less.
- One square down is 57: ten more.
- One square up is 37: ten less.
So a blank square can be filled from any neighbour. If the square above a blank is 62, the blank is 72. This is also how to add 10, or 20, without counting.
Tips for parents and teachers
- Choose "None" to print a full chart for the wall or for skip counting with colour pencils.
- Ask pattern questions on a full chart: colour every fifth number; what do you see?
- An empty grid ("All") is a good test at the end of the term.
How to use this sheet at home and in class
- At home: start with "A few" blanks, then "About half". Print one full chart and keep it; it is useful for months.
- In class: on a full chart, let children colour the numbers they say when counting by 2, by 5 and by 10, each in a different colour, and talk about the stripes that appear.
- For classes 2 and 3, choose a chart that starts from 101 or 901. The pattern is the same, and it makes numbers up to 1,000 friendly.
Mistakes to watch for
- Writing 20 at the start of the third row instead of at the end of the second. Each row ends with a full ten.
- Slips at the turn of a row, where 39 is followed by 40 on the same row and 41 starts the next.
- Filling blanks only by counting from 1. Show the neighbour method; it is the whole point of the chart.
What to try next
- Number sequences worksheets: skip counting without the chart.
- Comparing numbers worksheets: which number is bigger.
- Place value worksheets: tens and ones written out.