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→Method 3: Octal to Binary / Binary to Octal
''Octal to Binary''
# '''One octal number''' represents '''3 binary numbers''', so space-out <br>the octal numbers to make space for a binary number.
# Write '''(4)(2)(1)''' under <u>each</u> octal number.
# Write '''0''''s or '''1''''s for each group of binary numbers to add up to the corresponding octal number (refer to diagram of ''octal to binary'' conversion).<br><br>