Thread: "3 : 3 x 2 = 2" vẫn bị giáo viên gạch sai, xem kĩ mới biết là lỗi sai mà rất nhiều người học Toán mắc phải
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Old 11-27-2021   #2
MrKetchup
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The title: "3 : 3 x 2 = 2" is wrong, it does not have any unit.
The answer selection from the question sheet is wrong and the provided answers from this article are also wrong.
The question: 3cm : 3 x 2dm Converts to meter: 0.03 : 3 x 0.2
Use the order of precedence, calculate from left to right: 0.03 : 3 = 0.01 then 0.01 x 0.2 = 0.002 or 2mm or 0.2cm. These are the correct answers!
This article said the answer is 20cm^2. I do not know what the symbol ^ means in VN but in America it means to the power of: 20cm^2= 0.0004 which is totally wrong. Same as 0,2dm^2
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