You ask : How many 500’s in 4800. By saying 9, place the value to the right
side of the present square root.
g) You will get the square root as 264.09.B. Example : 75832
a) Set the number 75832 in the abacus.
b) Ask : What is the highest perfect square in 758? By saying 729, set the
square root 27 to the left of the number and subtract 729 from 758. You are
left with 2932 in the abacus.
c) Now double the square root and set it in the left extreme. The value is 54.
d) Now consider the divisor 54 and the dividend 2932. Now ask : how many 5’s
in 29. By saying 5, set the digit to the right side of the present square root.
You will get the number as 275. Set this 5 to the right side of the 54. It will
become 545. Multiply 5×545. The value is 2725. Subtract this from 2932.
You will be left with 207.
e) Now you have to start with your decimal part of the square root. Add one
zero to the remainder. It will become 2070. You ask : how many 550s (round
figure) in 2050. Approximately 4. Set this 4 to the right side of the present
square root.
f) The value is 275.4EXERCISE
Find the square root of the following numbers :- 7884 6. 7885
- 22415 7. 34342
- 5638 8. 9876
- 65423 9. 56431
- 5454 10. 43088