0,25×{0,25÷[(2,5-0,3-1,75):0,5]}

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вопрос

To simplify this expression, we first need to solve the innermost operation within the parentheses.

Starting from the innermost operation:
(2.5 - 0.3 - 1.75) = 0.45

Now we divide 0.45 by 0.5:
0.45 ÷ 0.5 = 0.9

Now we divide 0.25 by 0.9:
0.25 ÷ 0.9 ≈ 0.27777778

So, the simplified expression is approximately 0.27777778.