Question

Binary number to decimal
1.(1101)2
2.(1001)2
3.(10010)2
please tell answer.​

Answer 1

1. (1101)2

= 1x2³ + 1x2² + 0x2¹ + 1x2⁰

= 1x8 + 1x4 + 0x2 + 1x1

= 8 + 4 + 0 + 1

= (13)10

2. (1001)2

= 1x2³ + 0x2² + 0x2¹ + 1x2⁰

= 8 + 0 + 0 + 1

= (9)10

3. (10010)2

= 1x2⁴ + 0x2³+ 0x2²+1x2¹ + 0x2⁰

= 16 + 0 + 0 + 2 + 0

= (18)10

there 10 is not a multiple of the number it is used to show decimal number