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+ means -, - means x, x means divide, divide means +: evaluate the expression

The same question, asked 3 times: 2 Mar 2023 Tier II*, 3 Mar 2023 Tier II*, 7 Mar 2023 Tier II. Every wording below, oldest first.

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  1. Question 1

    2 Mar 2023 Tier II

    37
    If + means −-, −- means ×\times, ×\times means ÷\div, and ÷\div means +, what will be the value of the following expression? 5÷5+5−10×10=?5 \div 5 + 5 - 10 \times 10 = ?

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  2. Question 2

    3 Mar 2023 Tier II

    47
    If + means −-, −- means ×\times, ×\times means ÷\div, and ÷\div means +, what will be the value of the following expression? 45×9÷12−5+345 \times 9 \div 12 - 5 + 3

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  3. Question 3

    7 Mar 2023 Tier II

    50
    If + means −-, −- means ×\times, ×\times means ÷\div, and ÷\div means +, what will be the value of the following expression? 3÷6+3−4×4=?3 \div 6 + 3 - 4 \times 4 = ?

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