Question

The sum of place value of digit 2 in the number 21.236 is
A.20
B.20.2
C.22
D.2.2

Answer 1

Hint: Firstly we spot the places of 2 in the given number and then we multiply it with its respective places value and add them.

Complete step-by-step answer:
First of all take 2 as our base value. Now multiply it with the values at tenth place and another at one-tenth place, later add both the values.
\[
   \Rightarrow 2 \times 10 + 2 \times \dfrac{1}{{10}} \\
   \Rightarrow 20 + 0.2 \\
   \Rightarrow 20.2 \\
\]
Hence option (b) will be our required answer.

Note: The place value of a digit in a number is the value it holds to be at the place in the number. We know about the place value and face value of a digit and we will learn about it in detail.
Place, Place Value and Face Value:

A number is formed by grouping the digits together.
● Each digit has a fixed position called its place.
● Each digit has a value depending on its place called the place value of the digit.
● The face value of a digit for any place in the given number is the value of the digit itself
● Place value of a digit = (face value of the digit) × (value of the place)