Matematika

Pertanyaan

isilah kotak dibawah ini
mohon bantuannya ka
1. 8 + 7 x 2 - 5 = 10 x 2 + 8 - . . .
2. 15 - 9 + 3 x 2 . . . + 8 x 2 - 8
3. 7 x 3 + 5 - 6 = 12 + . . . - 2 x 2
4. 27 - 15 + . . . x 2 = 8 x 3 + 6 - 10
5. 12 + 3 x 20 . . . = 2 x 6 + 20 - 8

1 Jawaban

  • 1.) 8 + 7 x 2 - 5 = 10 x 2 + 8 - ...
    8 + 14 - 5 = 20 + 8 - ...
    17 = 28 - ...
    17 - 28 = - (-11) = 11

    2.) 15 - 9 + 3 x 2 = ... + 8 x 2 - 8
    6 + 6 = ... + 16 - 8
    12 = ... + 8
    12 - 8 = 4

    3.) 7 x 3 + 5 - 6 = 12 + ... - 2 x 2
    20 = 12 + ... - 4
    20 - 12 = ... - 4
    8 = ... - 4
    8 + 4 = 12

    4.) 27 - 15 + ... x 2 = 8 x 3 + 6 - 10
    12 + ... x 2 = 20
    12 + ... = 20 / 2
    12 + ... = 10
    12 - 10 = 2

    5.) 12 + 3 x 20 - ... = 2 x 6 + 20 - 8
    72 - ... = 24
    - ... = 24 - 72
    24 - 72 = - (-48) = 48

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