Question

Round the following numbers to 2 significant digits

(a) 3472,

(b) 84.16,

(c) 2.55 and

(d) 28.5.

Answer 1

(a) In the value 3472, after the digit 4,7 is present. Its value is greater than 5. So the next two digits are neglected and the value of 4 is increased y 1.

$\therefore$ Value becomes 3500

(b) Value = 84

(c) 2.6

(d) value is 28.