Matematika

Pertanyaan

1. 4 1/2 x 1/2 - 1/2
2. 4/5 x 3/5 + 2/7
3. 1 2/9 x ( 3/5 + 2/3)
4. 5/7 : 2/4 - 1/6
5. 2/7 - 1/9 : 2/9

1 Jawaban

  • 1. 9/2 x 1/2 - 1/2 = 9/4 -1/2
                               = 9/4 - 2/4 = 7/4
    2. 4/5 x 3/5 + 2/7 = 12/25 + 2/7
                                = 84/175 + 50/175 = 134/175
    3. 11/9 x (3/5 + 2/3 ) = 11/9 x ( 9/15 + 10/15 )
                                     =11/9 x 19/15
                                     = 76/135
    4. 5/7 : 2/4 - 1/6 = 5/7 x 4/2 - 1/6
                              = 20/14 - 1/6 = 60/42 - 7/42 = 63/42 = 21/14 = 3/2

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