Matematika

Pertanyaan

C.1/2 kali 1 1/3 +2/8:10/6
D.1 2/3:2 1/2- 3/5 kali 1 7/2

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2 Jawaban

  • c. 1/2 x 1 1/3 + 2/8 : 10/8
    = 1/2 x 4/3 + 2/8 x 8/10
    = 4/6 + 16/80
    = 160 + 48 / 240
    = 208 / 240
    = 13 / 15

    d. 1 2/3 : 2 1/2- 3/5 x 1 7/2
    = 5/3 x 2/5 - 3/5 x 9/2
    = 10/15 - 27/10
    = 20 - 81 / 30
    = -61/30

  • c. 1/2 x 1 1/3 + 2/8 : 10/6
    = 1/2 x 4/3 + 2/8 x 6/10
    = 2/3 + 3/20
    = 120/60 + 9/60
    = 129/60
    = 43/20
    = 2 3/20

    d. 1 2/3 : 2 1/2 - 3/5 x 1 7/2
    = 5/3 : 5/2 - 3/5 x 9/2
    = 5/3 x 2/5 - 3/5 x 9/2
    = 2/3 - 27/10
    = 20/30 - 81/30
    = - 61/30
    = - 2 1/30

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