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When 9 is converted into Roman numerals it is IX which is an abridged version of VIIII and so the required calculations are as follows:-

MDCCLXXVI+IX = MDCCLXXXV => 1776+(10-1) = 1785

MDCCLXXVI+VIIII = MDCCLXXXV => 1776+9 = 1785

MDCCLXXVI-IX = MDCCLXVII => 1776-(10-1) = 1767

MDCCLXXVI-VIIII = MDCCLXVII => 1776-9 = 1767

Note that in mathematics -(10-1) changes to 1-10

QED

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โˆ™ 2015-03-04 13:52:54
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Q: How would you work out 1776 plus 9 in two different ways and 1776 minus 9 in two different ways but working out all four calculations entirely in Roman numerals with explanations?
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