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E:\Working\Focus_Learning\Math_Genius_3_(11-09-2024)\Open_Files\CHAP_01
\ 11-Sep-2024 Surender Prajapati Proof-4 Reader’s Sign _______________________ Date __________
Practice time 1g
1. Write the roman numerals for each of the following numbers.
(a) 16 (b) 25 (c) 39 (d) 27
2. Write the Hindu-arabic numerals for each of the following.
(a) XVIII (b) XXIX (c) XXXVII (d) XXXIV
3. Fill in the blanks:
(a) The Roman numeral for 26 is __________.
(b) The successor of XXX is ____________.
(c) The predecessor of 20 in Roman numeral is _______.
(d) The greatest 1-digit number in Roman numeral is ___________.
(e) When we add V to X and then subtract I from the number, we get _______.
Encapsulate
math
NUmberS UP tO 9999
Place Value of a Number Face Value of a Number
• Value of each digit in a number Face value is the actual value of the digit in a number
• Multiply the digit with 1000, if it is in the thousands place. example: Face value of 4 in 485 is 4.
• Multiply the digit with 100, if it is in the hundreds place.
• Multiply the digit with 10, if it is the tens place. 2-digit Numbers
• Multiply the digit with 1, if it is in the ones place. Smallest number 10 Greatest number 99
example: Place value of 4 in 485 is 400
3-digit Numbers
expanded Form
Smallest number 100 Greatest number 999
The number represented as the sum of place value of its
each digit.
example: 485 = 400 + 80 + 5 4-digit Numbers
Formation of greatest and Smallest Numbers Smallest number 1000 Greatest number 9999
To form the greatest number, arrange the given digits in
descending order. even and Odd numbers
example: 8643 is the greatest 4-digit number formed
using the digits 6, 3, 8, 4. Every even number ends with the digit 2, 4, 6, 8 or 0.
To form the smallest number, arrange the given digits in example: 56, 742, 1230
descending order. Every odd number ends with the digit 1, 3, 5, 7 or 9.
example: 3468 is the smallest 4-digit number formed example: 51, 637, 1459
using the digits 6, 3, 8, 4.
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