(mixed fraction + decimal) - number

The same question, asked 2 times: 12 Sep 2025 S1*, 13 Sep 2025 S2. Every wording below, oldest first.

Try each one first, then open its answer.

Question 1
12 Sep 2025 S1
52 $\left(2\frac{1}{2} + 3.6\right) - 1.9$
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Question 2
13 Sep 2025 S2
52 $\left(1\frac{2}{5} + 2.6\right) - 1\frac{3}{4}$
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