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Q. What is number system?
Answer: It is a system for
representing numeric values or
quantities using different
symbols (di...
Q. What is decimal number
system?
Answer: The decimal number
system has base 10. It uses the
digits 0 to 9.
Q. What does base or radix
mean?
Answer: The number of digits
(symbols) a number system
use is called base or radix of
tha...
Today we will learn
BINARY NUMBER SYSTEM
Q. What is binary number
system?
Answer: The binary number
system has base 2. It uses the
digits 0 and 1 only.
Q. How we write a binary
number?
Answer: The binary number is
written as (1010)2 because its
base is 2.
COUNTING IN BINARY NUMBERS
Decimal Binary Decimal Binary
0 0 12 1100
1 1 13 1101
2 10 14 1110
3 11 15 1111
4 100 16 10000
...
DIVISION METHOD:
i. Divide the number by 2.
ii. Put the reminder on right
side.
iii. Keep dividing the quotient
till we ge...
Activity
• Convert (31)10 into its binary equivalent.
Answer should be (11111)2
Q. What is the place value 2 in
(1259)10?
Answer: The place value of 2 in
(1259)10 is 2×100 = 2×102
= 200.
EXPANSION METHOD:
i. Multiply each digit with
its place value.
ii. Add these place values.
iii. The sum is a decimal
numbe...
Activity
• Convert (11011)2 into its decimal
equivalent.
Answer should be (27)10
Q. What digits are used in
binary number system?
Answer: The binary number
system uses only 0 and 1.
Q. What is the base of binary
number system?
Answer: The base of binary
number system is 2.
Q. Which method is used to
convert a decimal number into
binary numbers?
Answer: To convert a decimal
number into binary n...
Q. Which method is used to
convert a binary numbers into
decimal number?
Answer: To convert a binary
number into decimal n...
Home Work
• Convert (63)10 into its binary
equivalent.
• Convert (100110)2 into its decimal
equivalent.
• Today we learned binary number
system
• In next lesson we will learn
addition and subtraction in
binary number system
BINARY NUMBER SYSTEM
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BINARY NUMBER SYSTEM

  1. 1. Q. What is number system? Answer: It is a system for representing numeric values or quantities using different symbols (digits).
  2. 2. Q. What is decimal number system? Answer: The decimal number system has base 10. It uses the digits 0 to 9.
  3. 3. Q. What does base or radix mean? Answer: The number of digits (symbols) a number system use is called base or radix of that number system.
  4. 4. Today we will learn BINARY NUMBER SYSTEM
  5. 5. Q. What is binary number system? Answer: The binary number system has base 2. It uses the digits 0 and 1 only.
  6. 6. Q. How we write a binary number? Answer: The binary number is written as (1010)2 because its base is 2.
  7. 7. COUNTING IN BINARY NUMBERS Decimal Binary Decimal Binary 0 0 12 1100 1 1 13 1101 2 10 14 1110 3 11 15 1111 4 100 16 10000 5 101 17 10001 6 110 18 10010 7 111 19 10011 8 1000 20 10100 9 1001 21 10101 10 1010 22 10110 11 1011 23 10111
  8. 8. DIVISION METHOD: i. Divide the number by 2. ii. Put the reminder on right side. iii. Keep dividing the quotient till we get the quotient less than 2. iv. Record reminders from bottom to top to get the answer. CONVERSION OF A DECIMAL NUMBER INTO BINARY NUMBER Example: (21)10 Answer: (21)10 = (10101)2
  9. 9. Activity • Convert (31)10 into its binary equivalent. Answer should be (11111)2
  10. 10. Q. What is the place value 2 in (1259)10? Answer: The place value of 2 in (1259)10 is 2×100 = 2×102 = 200.
  11. 11. EXPANSION METHOD: i. Multiply each digit with its place value. ii. Add these place values. iii. The sum is a decimal number. CONVERSION OF A BINARY NUMBER INTO DECIMAL NUMBER Example: (11101)2 =(1×24 )+ (1×23 )+(1×22 )+(0×21 )+(1×20 ) =(1×16)+ (1×8) +(1×4)+ (0×2)+(1×1) = 16 + 8 + 4 + 0 + 1 = 29 Answer: (11011)2 = (29)10
  12. 12. Activity • Convert (11011)2 into its decimal equivalent. Answer should be (27)10
  13. 13. Q. What digits are used in binary number system? Answer: The binary number system uses only 0 and 1.
  14. 14. Q. What is the base of binary number system? Answer: The base of binary number system is 2.
  15. 15. Q. Which method is used to convert a decimal number into binary numbers? Answer: To convert a decimal number into binary number we use Division method.
  16. 16. Q. Which method is used to convert a binary numbers into decimal number? Answer: To convert a binary number into decimal number we use Expansion method.
  17. 17. Home Work • Convert (63)10 into its binary equivalent. • Convert (100110)2 into its decimal equivalent.
  18. 18. • Today we learned binary number system • In next lesson we will learn addition and subtraction in binary number system
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