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Pertanyaan

2,3 × 1,32 + 11,2 ÷ 2,8 - 1,23 × (-2,9) = ....

2,3 × 1,32 + 11,2 ÷ 2,8 - 1,23 × (-2,9) =  ....

  1. 10,603

  2. 9,739

  3. 3,469

  4. 2,605

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P. Tessalonika

Master Teacher

Mahasiswa/Alumni Universitas Negeri Medan

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Pembahasan

Perhatikan bahwa Sehingga

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begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 2 , 3 end cell equals cell 23 over 10 end cell row cell 1 , 32 end cell equals cell 132 over 100 equals 33 over 25 end cell row cell 11 , 2 end cell equals cell 112 over 10 equals 56 over 5 end cell row cell 2 , 8 end cell equals cell 28 over 10 equals 14 over 5 end cell row cell 1 , 23 end cell equals cell 123 over 100 end cell row cell 2 , 9 end cell equals cell 29 over 10 end cell end table end style        

Sehingga

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 2 , 3 cross times 1 , 32 plus 11 , 2 divided by 2 , 8 minus 1 , 23 cross times open parentheses negative 2 , 9 close parentheses end cell equals cell 23 over 10 cross times 33 over 25 plus 56 over 5 divided by 14 over 5 minus 123 over 100 cross times open parentheses negative 29 over 10 close parentheses end cell row blank equals cell 759 over 250 plus 56 over 5 cross times 5 over 14 plus 3567 over 1000 end cell row blank equals cell 759 over 250 plus 280 over 70 plus 3567 over 1000 end cell row blank equals cell 759 over 250 plus 4 plus 3567 over 1000 end cell row blank equals cell 3036 over 1000 plus 4000 over 1000 plus 3567 over 1000 end cell row blank equals cell 10603 over 1000 end cell row blank equals cell 10 , 603 end cell end table end style            

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Nilai taksiran dari 12 , 25 × 39 , 875 + 103 , 6521 ÷ 7 , 912 − 97 , 2391 adalah ....

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