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8+5=1 seharusnya 13
4+11=3 seharusnya 15
maka 9+7 = 4 seharusnya 16.
karena hasilnya di kurangi 12
Contoh...
7 + 10 = (7 + 10) - 12
= 17 - 12
= 15
8 + 5 = (8 + 5) - 12
= 13 - 12
= 1
Maka...
9 + 7 = (9 + 7) - 12
= 16 - 12
= 4
Jadi jawabannya adalah 4.