clarissefakreddine clarissefakreddine

21-05-2017
Mathematics

contestada

If a, b, c, and d are four different digits from 1 to 9, inclusive, then what's the largest possible value for the decimal a.b + c.d ?

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Аноним Аноним

21-05-2017

I think the answer would be 10-18.

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MathWhiz777 MathWhiz777

22-08-2022

Answer:

18.3

Step-by-step explanation:

The units digits contribute more to a.b + c.d than the tenths digits, so we use 8 and 9 for a and c (it doesn't matter which is which), and we use 6 and 7 for b and d. This gives a maximum possible value of 9.7 + 8.6 = 18.3.

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