Question

Find the square roots of the following decimal numbers.
i) $2.56$ ii) $18.49$ iii) $68.89$ iv) $84.64$

Answer 1

1

$2.56=1.6\times 1.6$

$\therefore \sqrt{2.56}=1.6$.

2

$18.49=4.3\times 4.3$

$\therefore \sqrt{18.49}=4.3$

3

$68.89=8.3\times 8.3$

$\therefore \sqrt{68.89}=8.3$

4

$84.64=9.2\times 9.2$

$\therefore \sqrt{84.64}=9.2$