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10 December, 03:13

Which equation shows the correct grouping symbols? A. (5 + 70) : 5 * 2 = 30 B. 5 + 70 : 5 * 2 = 30 C. 5 + (70 : 5) * 2 = 30 D. 5 + 70 : (5 * 2) = 30 A. B. C. D.

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  1. 10 December, 04:36
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    equation A

    Step-by-step explanation:

    To know what equation is correct, we can calculate the left part of each one, and checking if the value matches the right part (which is always 30)

    (Remember: to calculate equations, we first solve operations inside parenthesis, then divisions and multiplications, and for last sums and subtractions)

    So, in option A, we have in the left part:

    (5 + 70) : 5 * 2 - > 75 : 5 * 2 - > 15 * 2 - > 30

    This option is correct, as the left part matches the right part.

    Checking the other options, we have for option B:

    5 + 70 : 5 * 2 - > 5 + 14 * 2 - > 5 + 28 - > 33

    It does not match the left part. For option C:

    5 + (70 : 5) * 2 - > 5 + 14 * 2 - > 5 + 28 - > 33

    It does not match the left part. For option D:

    5 + 70 : (5 * 2) - > 5 + 70 : 10 - > 5 + 7 - > 12

    It does not match the left part. So, the correct answer is equation A
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