Algebra

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Which of the following equations containing grouping symbols is correct?
A. (6 + 9) − 1 + (4 ÷ 1) = 12
B. 9 + (12 ÷ 4) = 1
C. 24 ÷ (8 + 4) + (16 ÷ 2) = 10
D. (3 − 1) − 2 − (8 − 5) = 12 − 9

  • Algebra -

    A.

    6 + 9 = 15

    4 ÷ 1 = 4


    ( 6 + 9 ) − 1 + ( 4 ÷ 1 ) = 12

    15 - 1 + 4 = 12

    14 + 4 = 12

    18 = 12 FALSE


    B.

    12 ÷ 4 = 3


    9 + ( 12 ÷ 4 ) = 1

    9 + 3 = 1

    12 = 1 FALSE


    C.

    8 + 4 = 12

    24 ÷ ( 8 + 4 ) = 24 ÷ 12 = 2

    ( 16 ÷ 2 ) = 8


    24 ÷ ( 8 + 4 ) + ( 16 ÷ 2 ) = 10

    2 + 8 = 10 Correct


    D.

    3 - 1 = 2

    8 - 5 = 3

    12 - 9 = 3


    ( 3 − 1 ) − 2 − ( 8 − 5 ) = 12 − 9

    2 - 2 - 3 = 3

    0 - 3 = 3

    - 3 = 3 False


    Ansver : C

  • Algebra -

    HEHEHEH

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