A contingent opportunity taken investigating in-between fractions
Résumé
In this paper, we discuss a contingent opportunity from a 7 th grade mathematics lesson about decimal numbers, percentages and fractions in Norway. The question if adding numerators and denominators of two fractions was a way to find an in between fraction, occurred. The teacher's response to this question, which we saw as contingent opportunity, is our focus here. Although the teacher did not have the substantive mathematics knowledge needed to give an answer to the problem, many mathematics activities took place in the lesson.
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