1. Thực hiện phép tính a) 3³.2-3.4² b) 8/9-|-2020/2021|+(-1/3)²

Question

1. Thực hiện phép tính
a) 3³.2-3.4²
b) 8/9-|-2020/2021|+(-1/3)²

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Ruby 1 năm 2021-07-24T01:12:04+00:00 2 Answers 38 views 0

Answers ( )

  1. tuanh
    0
    2021-07-24T01:13:30+00:00
    Reply

    `a) 3^3 . 2 – 3.4^2`

    `= 27.2 – 3.16`

    `= 54 – 48`

    `= 6`

    `b) 8/9 – |-2020/2021| + (-1/3)^2`

    `= 8\9 – 2020/2021 + 1/9`

    `= 1 – 2020/2021`

    `= 1/2021`

  3. chauhoangmy
    0
    2021-07-24T01:13:40+00:00
    Reply

    `a) 3^3. 2 – 3. 4^2`

    `= 3^3. 2 – 3. (2^2)^2`
    `=  3^3. 2 – 3. 2^4`

    `= 3. 2. (3^2 – 2^3)`

    `= 6. (9 – 8)`

    `= 6. 1`

    `= 6`

    `b) 8/9 – |-2020/2021| + (-1/3)^2`

    `= 8/9 – 2020/2021 + 1/9`

    `= (8/9 + 1/9) – 2020/2021`

    `= 1 – 2020/2021`

    `= 1/2021`

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