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Two studies were conducted to understand why subtraction with fluency is harder than addition. In Study I, 33 kindergartners were individually asked to transfer cubes from a glass to an empty bottle, one by one, with one-to-one correspondence with the interviewer. They were then asked if the quantities remaining in the two glasses were the same and if the quantities in the two bottles were the same...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.