Question

Subtract in Hexadecimal

Answer 1

Hexadecimal Subtraction

• The subtraction of hexadecimal numbers follow the same rules as the subtraction of numbers in any other number system.
• The only variation is in borrowed number. In the decimal system, you borrow a group of 10₁₀. In hexadecimal system you borrow a group of 16₁₀.

-->1) It start from right hand side, subtract decimal value of hex number in second row from the decimal value of hex number in first row. (A-B = 10-11)

--> 2) If number in first row is smaller than number in second row (A<B), borrow from the next number in the first row. In hex, ‘16’ is borrowed instead of ‘1’.

--> 3) Carry out the subtraction after borrowing and convert the answer to Hex.

(16+A–B = 16+10-11 = 15, 15 in decimal in F in Hex)

--> 4) Repeat step 1 and 2. Repeat step 3 if necessary.

-->5) Repeat step 4. .

Example

3F -14 = ?

==> Answer

consider A= 3F

consider B= 14

Decimal Value A 63

Decimal Value B 20

Decimal Subtraction 43

Hex Subtraction 2B

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Example

9 6 5 4

- 5 3 2 1

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4 3 3 3

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Example

8 6 3 ---> barrow

9 7 4 B

- 5 8 7 C

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3 E C F