2nd Class Mathematics Ones and Tens Ones, Tens, Hundreds and Thousands

Ones, Tens, Hundreds and Thousands

Identifying Ones and Tens

In any number, first number from the right is called ones and second number from the right is called tens. The place value of digit at tens is obtained by multiplying the number by 10.

•           Example:

What is the place value of 6 in the number 67?

(a) 60                                                                (b) 10

(c) 70                                                                (d) All the above

(e) None of these

Ans.     (a)

Explanation: 67 = 6 tens + 7 ones. Therefore place value of 6 is 60.

•           Example:

A four digit number is 23 less than the four digit greatest number. What will be the digit at tens place?

(a) 6                                                                  (b) 7

(c) 5                                                                  (d) All the above

(e) None of these

Ans.     (b)

Explanation: Four digit greatest number is 9999. Required number is 9999 - 23 = 9976. Digit at second place from right is 7. Therefore, option (b) is correct.

Identifying Hundreds in a Number

For the identification of hundreds in a number, the number should be of three or more digits. To obtain the place value of digit at hundreds place, the digit is multiplied by 100.

•          Example:

Find the place value of digit 5 in 4567.

(a) 400                                                                (b) 500         

(c) 5                                                                  (d) All the above

(e) None of these

Ans.     (b)

Explanation: 4567 = 4000 + 500 + 60 + 7. Therefore, option (b) is correct.

•          Example:

Find the digit which is at hundreds place of three digit smallest number.

(a) 0                                                                  (b) 00          

(c) 1                                                                  (d) All the above

(e) None of these

Ans.     (c)

Explanation: 3 digit smallest number is 100. Therefore, option (c) is correct.

Identifying Thousands in a Number

For the identification of thousands in a number, the number should be of four or, more digits. To obtain the place value of digit at thousands, the digit is multiplied by 1000.

•          Example:

What is the place value of digit 9 in 569873?

(a) 9873                                                                (b) 900

(c) 9000                                                                (d) All the above

(e) None of these

Ans.     (c)

Explanation: Digit 9 is at thousands place. Therefore, option (c) is correct.

•          Example:

If digit at thousands place of a number is one less than the digit at hundreds place, and digit at hundreds place is one less than the digit at tens place, find the number, if digit at tens place is 1 less than the digit at unit place and digit at unit place is 8.

(a) 5678                                                            (b) 4568        

(c) 7658                                                             (d) All the above

(e) None of these

Ans.     (a)

Explanation: Digit at tens is 7, 6 is at hundreds place and 5 is at the thousands place. Therefore, option (a) is correct. 

Place Value Chart

Following are the place value of digits of 4276:

•          Example:

Identify the place of digit 3 in 5632.

(a) Units                                                         (b) Tens

(c) Hundreds                                                      (d) All the above

(e) None of these

Ans.     (b)

Explanation: Digit 3 is second from right. Therefore, option (b) is correct.

•          Example:

What is the place value of 1 in 4561823?

(a) 1000                                                            (b) 10000

(c) 100                                                             (d) All the above

(e) None of these

Ans.     (a)

Explanation: 1 is at the thousands place. Therefore, option (a) is correct,