12 plus 8 equals 4? Thai pupil's homework goes viral for teacher's mistake

If Joy picked 12 mangoes and Joe picked eight more mangoes more than she did, how many mangoes did Joe pick?

Conventional wisdom would suggest the answer is “20”, but for one first-grade math teacher somewhere in Thailand, the correct calculation is four.

A woman posting on Facebook on Tuesday as Phuan Pennapa wanted to know how her niece’s teacher could find fault with such a straightforward answer, on which the aunt even provided a little coaching.

from Asia
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