Question

find the square root of following number by the repeated subtration method
1. 16
2.49
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Answer 1

1》16

$16 - 1 = 15$

$15 - 3 = 12$

$12 - 5 = 7$

$7 - 7 = 0$

$\sqrt{16} = 4$

2》49

$49 - 1 = 48$

$48 - 3 = 45$

$45 - 5 = 40$

$40 - 7 = 33$

$33 - 9 = 24$

$24 -11 = 13$

$13 - 13 = 0$

$\sqrt{49} = 7$