Question

6) Number= 36
Method = Estimation find the square​

Answer 1

Answer:

7

Step-by-step explanation:

Solution :

(i) 36 -1 = 35

(ii) 35 – 3= 32

(iii) 32 – 5 = 27

(iv) 27 – 7= 20

(v) 20 – 9 = 11

(vi) 11 – 11 = 0

Here, the total number of subtractions is 7.

∴ √49 = 7

Estimation method, first find the unit digit of square root from the unit digit of given number using the following table. Discard the last two digits and then check between which two squares the remaining numbers lie.