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3 × 37 = 111
Salah :
- ( 50 - 37 ) = 37 - 50 = -13
Nilai :
111 - 13 = 98
jawaban benar = 3
jawaban salah = -1
jika jawaban benar 37 , maka pasti yg salah 50-37 = 13
jadi 37(-3) + 13(-1)
= 111 + (-13)
= 98
jadi nilai yg diperoleh adalah 98