Part I Exercise 1.2
Q1. Define predecessor and successor of a number.
Ans: Predecessor: The number that comes just before a given number is called its predecessor. (Predecessor = Given number – 1).
• Successor: The number that comes just after a given number is called its successor. (Successor = Given number + 1).
Q2. Write the predecessor of the given numbers:
a. 31,94,78,301
Ans: 31,94,78,301 – 1 = 31,94,78,300
b. 1,48,10,999
Ans: 1,48,10,999 – 1 = 1,48,10,998
c. 2,84,65,78,946
Ans: 2,84,65,78,946 – 1 = 2,84,65,78,945
d. 80,00,00,00,000
Ans: 80,00,00,00,000 – 1 = 79,99,99,99,999
e. 84,17,94,180
Ans: 84,17,94,180 – 1 = 84,17,94,179
Q3. Write the successor of the given numbers:
a. 9,18,34,784
Ans: 9,18,34,784 + 1 = 9,18,34,785
b. 35,01,84,730
Ans: 35,01,84,730 + 1 = 35,01,84,731
c. 9,99,99,99,999
Ans: 9,99,99,99,999 + 1 = 10,00,00,00,000
d. 40,00,00,000
Ans: 40,00,00,000 + 1 = 40,00,00,001
Q4. Fill the blanks with <, > or = :
- a. 1,15,47,97,341 <84,00,57,97,341
- b. 9,14,70,345 >9,14,70,344
- c. 30,18,754 <1,17,37,945
- d. 48,73,10,485 >48,73,104
- e. 5,64,18,725 >5,64,17,725
Q5. Arrange the following numbers in the ascending order:
a. 51,72,48,947 ; 1,87,34,94,287 ; 34,94,187 ; 9,18,348
Ans: 9,18,348 < 34,94,187 < 51,72,48,947 < 1,87,34,94,287
b. 30,00,17,546 ; 9,18,43,754 ; 61,00,24,751 ; 8,14,15,182
Ans: 8,14,15,182 < 9,18,43,754 < 30,00,17,546 < 61,00,24,751
Q6. Arrange the following numbers in the descending order:
a. 1,00,37,18,384 ; 1,00,37,08,384 ; 1,00,37,28,384 ; 1,00,37,88,384
Ans: 1,00,37,88,384 > 1,00,37,28,384 > 1,00,37,18,384 > 1,00,37,08,384
b. 3,54,18,765 ; 3,45,18,765 ; 3,45,81,765 ; 3,45,18,675
Ans: 3,54,18,765 > 3,45,81,765 > 3,45,18,765 > 3,45,18,675