hex to decimal conversion error/ missing step?

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I'm trying to convert hex 8B to decimal.
Though I keep getting wrong decimal?
I used this https://www.youtube.com/watch?v=t_kA5KQxByc as a guide.



I see that the soln is 139.



8B



8421 | 8421



1000 | 1011



128 64 32 16 8 4 2 1



1 0 0 0 1 0 1 1



Adding, I get 141??




binary




share|cite|improve this question



















  • $8B = 8 * 16^1 + B * 16^0$
    – user1949350
    Jul 19 at 1:02










  • $128+8+colorred2+1=139$... so I'm not sure where you're getting $141$ from. $141=128+8+colorred4+1$, so maybe you misread a $2$ as a $4$.
    – JMoravitz
    Jul 19 at 1:03







  • 1




    Perhaps your error comes from your inability to read your chart you made for yourself... properly aligning things might help: $beginarrayc128&64&32&16&8&4&2&1\1&0&0&0&1&0&1&1endarray$
    – JMoravitz
    Jul 19 at 1:06














up vote
0
down vote

favorite












I'm trying to convert hex 8B to decimal.
Though I keep getting wrong decimal?
I used this https://www.youtube.com/watch?v=t_kA5KQxByc as a guide.



I see that the soln is 139.



8B



8421 | 8421



1000 | 1011



128 64 32 16 8 4 2 1



1 0 0 0 1 0 1 1



Adding, I get 141??




binary




share|cite|improve this question



















  • $8B = 8 * 16^1 + B * 16^0$
    – user1949350
    Jul 19 at 1:02










  • $128+8+colorred2+1=139$... so I'm not sure where you're getting $141$ from. $141=128+8+colorred4+1$, so maybe you misread a $2$ as a $4$.
    – JMoravitz
    Jul 19 at 1:03







  • 1




    Perhaps your error comes from your inability to read your chart you made for yourself... properly aligning things might help: $beginarrayc128&64&32&16&8&4&2&1\1&0&0&0&1&0&1&1endarray$
    – JMoravitz
    Jul 19 at 1:06












up vote
0
down vote

favorite









up vote
0
down vote

favorite











I'm trying to convert hex 8B to decimal.
Though I keep getting wrong decimal?
I used this https://www.youtube.com/watch?v=t_kA5KQxByc as a guide.



I see that the soln is 139.



8B



8421 | 8421



1000 | 1011



128 64 32 16 8 4 2 1



1 0 0 0 1 0 1 1



Adding, I get 141??




binary




share|cite|improve this question











I'm trying to convert hex 8B to decimal.
Though I keep getting wrong decimal?
I used this https://www.youtube.com/watch?v=t_kA5KQxByc as a guide.



I see that the soln is 139.



8B



8421 | 8421



1000 | 1011



128 64 32 16 8 4 2 1



1 0 0 0 1 0 1 1



Adding, I get 141??





binary





share|cite|improve this question










share|cite|improve this question




share|cite|improve this question









asked Jul 19 at 0:58









hellothere

113




113











  • $8B = 8 * 16^1 + B * 16^0$
    – user1949350
    Jul 19 at 1:02










  • $128+8+colorred2+1=139$... so I'm not sure where you're getting $141$ from. $141=128+8+colorred4+1$, so maybe you misread a $2$ as a $4$.
    – JMoravitz
    Jul 19 at 1:03







  • 1




    Perhaps your error comes from your inability to read your chart you made for yourself... properly aligning things might help: $beginarrayc128&64&32&16&8&4&2&1\1&0&0&0&1&0&1&1endarray$
    – JMoravitz
    Jul 19 at 1:06
















  • $8B = 8 * 16^1 + B * 16^0$
    – user1949350
    Jul 19 at 1:02










  • $128+8+colorred2+1=139$... so I'm not sure where you're getting $141$ from. $141=128+8+colorred4+1$, so maybe you misread a $2$ as a $4$.
    – JMoravitz
    Jul 19 at 1:03







  • 1




    Perhaps your error comes from your inability to read your chart you made for yourself... properly aligning things might help: $beginarrayc128&64&32&16&8&4&2&1\1&0&0&0&1&0&1&1endarray$
    – JMoravitz
    Jul 19 at 1:06















$8B = 8 * 16^1 + B * 16^0$
– user1949350
Jul 19 at 1:02




$8B = 8 * 16^1 + B * 16^0$
– user1949350
Jul 19 at 1:02












$128+8+colorred2+1=139$... so I'm not sure where you're getting $141$ from. $141=128+8+colorred4+1$, so maybe you misread a $2$ as a $4$.
– JMoravitz
Jul 19 at 1:03





$128+8+colorred2+1=139$... so I'm not sure where you're getting $141$ from. $141=128+8+colorred4+1$, so maybe you misread a $2$ as a $4$.
– JMoravitz
Jul 19 at 1:03





1




1




Perhaps your error comes from your inability to read your chart you made for yourself... properly aligning things might help: $beginarrayc128&64&32&16&8&4&2&1\1&0&0&0&1&0&1&1endarray$
– JMoravitz
Jul 19 at 1:06




Perhaps your error comes from your inability to read your chart you made for yourself... properly aligning things might help: $beginarrayc128&64&32&16&8&4&2&1\1&0&0&0&1&0&1&1endarray$
– JMoravitz
Jul 19 at 1:06















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