There are 100 squares in a 10 by 10 grid.
To discover the total number of squares in any square or rectangular grid, multiply the number of squares along two adjacent sides and you will arrive at the correct answer everytime.
From Someone Else:
The grid itself is a square alone; think about it, that's 1 on top of your 100.
Look closer. There are actually 385 squares
4 squares in a 2 by 2 grid 9 squares in a 3 by 3 grid 16 squares in a 4 by 4 grid 25 squares in a 5 by 5 grid 36 squares in a 6 by 6 grid 49 squares in a 7by 7 grid 64 squares in a 8 by 8 grid 81 squares in a 9 by 9 grid 100 squares in a 10 by 10 grid
If the grid is 10 by 10 or 100 squares, then 2/10 would be 20 squares.
10 x 11 = 110
25
5