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How would you square 69 in Roman numerals giving step by step instructions and clear reasons for your answer?
Wiki User
∙ 13y ago
Today we would write out 69 in Roman numerals as LXIX but during the Roman era it was calculated as LXVIIII and by placing I to both sides of these numerals was probably simplified to ILXX (-1+70 = 69) in written form which made multiplication a lot easier because:-
-I*ILXX = +I -LXX
L*ILXX = -L+MMMD
X*ILXX = -X+DCC
X*ILXX = -X+DCC
Calculation: MMMMDCCCCI - CXXXX = MMMMDCCLXI or as (IV)DCCLXI which are both the eqivalent of 4761
Remember that a minus number multiplied by a minus number produces a positive number. So -I*-I = I
Roman numerals: M=1000, D=500, C=100, L=50, X=10, V=5 and I=1
Wiki User
∙ 13y ago
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