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    Question

    2850 ÷ 2.5 - ? × 42 =

    300
    A 10 Correct Answer Incorrect Answer
    B 30 Correct Answer Incorrect Answer
    C 40 Correct Answer Incorrect Answer
    D 20 Correct Answer Incorrect Answer

    Solution

    2850 ÷ 2.5 - ? × 42 = 300 1140 - ? × 42 = 300 1140 - 300 = ? × 42 840/42 = ? ? = 20

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