Predecessor and Successor, Formation and application of large Numbers Formation of numbers from digits.
Objectives:
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Predecessor and Successor
What is the predecessor of 19078?
19077
Predecessor = Number - 1
= 19078 - 1 = 19077
What is the biggest 2 digit number?
99
What is the smallest 3 digit number?
100
Successor of number 99 is __________________
99+1 = 100
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Formation of Big Number and their usage
How many thousands are there in 1 lakh?
Lakh | ten thousand | thousand | hundred | ten | one | |
1 lakh | 1 | 0 | 0 | 0 | 0 | 0 |
1 thousand | 1 | 0 | 0 | 0 |
1 lakh = 100000
1 thousand = 1000
1 lakh / 1 thousand = 100000/1000 = 100
1 lakh = 100 x 1 thousand
Formation of numbers from given digits:
How many digits are there in number: 2398
4
2 | 3 | 9 | 8 |
Make different 2 digit numbers using digits: 2 and 9
Ten | One | Number |
2 | 9 | 29 |
9 | 2 | 92 |
If repetition of numbers is allowed | ||
2 | 2 | 22 |
9 | 9 | 99 |
Tip: Think before answering.
How many numbers can you form using digits: 2, 2?
Single digit numbers:
2 digit numbers:
What is the successor of 9999?
10000
Number of 10s in 1 lakh = ______________
1 lakh = 1 00 000
so number of 10s = $\frac{100000}{10}\phantom{\rule{0ex}{0ex}}$ = 10 000