Question

Find the square root of $81$ using the repeated subtraction method?

Answer 1

To find: <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\sqrt{81}$

The steps to find the square root of $81$ are:
1) 81 – 1 = 80
2) 80 – 3 = 77
3) 77 – 5 = 72
4) 72 – 7 = 65
5) 65 – 9 = 56
6) 56 – 11 = 45
7) 45 – 13 = 32
8) 32 – 15 = 17
9) 17 – 17 = 0

Here, the result “0” is obtained in step 9. Hence, the square root of 81 is $9$.