Download the Number Grid to 100 below:
How do we Add or Subtract using the Number Grid?
For example:
If we start at 14 and move one place to the right, we have added 1.
14 + 1 = 15.
If we begin with a number that is at the end of a row, we move to the beginning of the next row.
For example:
If we begin with 30, to add 1, we move to the beginning of the next row.
30 + 1 = 31.
If we choose a number on the number grid and move one place to the left, we are subtracting 1.
For example:
If we start at 77 and move one place to the left, we have subtracted 1.
77 – 1 = 76.
If we start with a number that is at the beginning of a row and subtract one, we move to the end of the previous row.
For example:
If we begin with 91, to subtract 1, we move to the end of the previous row.
91 – 1 = 90.
