Definition
Hundred chart
A hundred chart is a 10-by-10 grid that lists 1 to 100 in counting order.
| Ones 1 | Ones 2 | Ones 3 | Ones 4 | Ones 5 | Ones 6 | Ones 7 | Ones 8 | Ones 9 | Ones 0 |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |
| 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 |
| 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 |
| 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 |
| 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 |
| 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 |
| 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 |
What it means
Think of the counting numbers parked in ten rows. Neighbours across a row are one apart. Numbers in the same column are ten apart, so patterns from counting by 2s, 5s, or 10s are easy to spot.
Remember it
Across means one more; straight down means ten more on the standard chart.
Example
Start at 47. One cell to the right is 48. One row below 47 is 57, because every row contains ten consecutive numbers.
Watch for
A random 10-by-10 table is not a hundred chart; the labels must follow a consistent counting rule.
Common mix-up
A hundred chart puts numbers in cells; a number line places numbers at ordered points on a line.
Exact meaning
A hundred chart is a 10-by-10 grid whose 100 cells show consecutive whole numbers. In the standard 1-to-100 arrangement, numbers increase by 1 from left to right across each row and by 10 from one row to the next.