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How could we use brackets to avoid the ambiguity of a decimal expression like 1.2.3 (read out as "one point two point three)?

If the rule is that A.B means A+(B/10), then 1.(2.3) = 1+(2.3/10) = 1+(.23) 1.23

On the other hand (1.2).3 = 1.2+(3/10) = 1.2+(.3) = 1.5

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