1. ICT-2013 Md. Yousuf Ali, Lecturer, ICT, Purba Mallikpur H.S. College Slide No: 1/6 Common Number Systems SystemBaseSymbols Used by humans? Used in computers? Binary20, 1NoYes Octal80, 1, 2, 3, 4, 5, 6, 7NoNo/Yes Decimal100, 1, 2, 3, 4, 5, 6, 7, 8, 9YesNo Hexa- decimal 160, 1, 2, 3, 4, 5, 6, 7, 8, 9 A, B, C, D, E, F NoNo/Yes

2. ICT-2013 Md. Yousuf Ali, Lecturer, ICT, Purba Mallikpur H.S. College Slide No: 2/6 অনুশীলন BinaryDecimalOctalDecimalHexDecimal 10111 3481 11000 1501C 11100 2115CD 10000001 5322D2F 10111101 8765D2FF 11110010101 876543AD2FE

3. ICT-2013 Md. Yousuf Ali, Lecturer, ICT, Purba Mallikpur H.S. College Slide No: 3/6 ভগ্নাংশ / Fractions Decimal to decimal 3.14 =>4 x 10 -2 = 0.04 1 x 10 -1 = 0.1 3 x 10 0 = 3 3.14

4. ICT-2013 Md. Yousuf Ali, Lecturer, ICT, Purba Mallikpur H.S. College Slide No: 4/6 ভগ্নাংশ / Fractions Binary to decimal 10.1011 => 1 x 2 -4 = 0.0625 1 x 2 -3 = 0.125 0 x 2 -2 = 0.0 1 x 2 -1 = 0.5 0 x 2 0 = 0.0 1 x 2 1 = 2.0 2.6875

5. ICT-2013 Md. Yousuf Ali, Lecturer, ICT, Purba Mallikpur H.S. College Slide No: 5/6 অনুশীলন BinaryDecimal 0.1101 0.110 0.101 0.011.001 0.11

6. ICT-2013 Md. Yousuf Ali, Lecturer, ICT, Purba Mallikpur H.S. College Slide No: 6/6 Thank you