1. Write a program using 8085 Microprocessor for Decimal, Hexadecimal addition and subtraction of two Numbers.

 ORG 0000h    ; Starting address of the program

; Decimal addition

MVI A, 05h    ; Load first decimal number in register A

MVI B, 07h    ; Load second decimal number in register B

ADD B         ; Add B to A

HLT           ; End of program

; Hexadecimal addition

MVI A, 0Ah    ; Load first hexadecimal number in register A

MVI B, 0Fh    ; Load second hexadecimal number in register B

ADD B         ; Add B to A

HLT           ; End of program

; Decimal subtraction

MVI A, 0Ah    ; Load first decimal number in register A

MVI B, 05h    ; Load second decimal number in register B

SUB B         ; Subtract B from A

HLT           ; End of program

; Hexadecimal subtraction

MVI A, 0Fh    ; Load first hexadecimal number in register A

MVI B, 05h    ; Load second hexadecimal number in register B

SUB B         ; Subtract B from A

HLT           ; End of program

END           ; End of program