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How do we convert Binary / Hexadecimal numbers into Denary ?

because
score: 14
express a binary or hex number in the expanded form and evaluate the result.

because
score: 3
ex. 1011= 1*2^3+0*2^2+1*2+1*1
=8+0+2+1
=11

because
score: 3
10100(2)=1x2^4+0x2^3+1x2^2+0x2+0x1
=16+0+4+0+0
=20

because
score: 1
Depart system consists of ten numerals:0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. 20 are numbers in the Denary system
 0 branch
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because
score: 2
Example for Hex to Denary:
ABCD
=10x16^3 + 11x16^2 + 12x16 + 13x1
= 7610368

because
score: 1
Expand and evaluate.
Using calculator is also a way.
 3 branch
 ‒

because
score: 1
Method to convert from binary to denary:
1x2^(place 1) + 1x2^(place 1) +...... +1
 1 branch
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