Recently, a simple elementary school math question has stumped many AI large models, with 8 out of 12 internationally renowned AI large models incorrectly answering the question "Which is larger, 9.11 or 9.9?"During the test, most large models mistakenly believed that 9.11 was greater than 9.9 when comparing numbers after the decimal point. Even under explicit mathematical context constraints, some large models still provided incorrect answers, revealing their shortcomings in mathematical abilit