
國中數學 單元1 數與數線 (難)
Flashcard
•
Mathematics
•
7th Grade
•
Easy
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15 questions
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1.
FLASHCARD QUESTION
Front
什麼是絕對值?
Back
絕對值是數字與零之間的距離,表示為|x|,無論x是正數還是負數,絕對值總是非負的。
2.
FLASHCARD QUESTION
Front
如果|甲數|=|乙數|,那麼甲數和乙數的關係是什麼?
Back
甲數可能等於乙數,也可能是乙數的相反數。
3.
FLASHCARD QUESTION
Front
負數中,愈大的數其絕對值愈小,這句話正確嗎?
Back
不正確,因為在負數中,數字越小(例如-5比-3小),其絕對值越大(|-5|=5, |-3|=3)。
4.
FLASHCARD QUESTION
Front
如果a和b是同號數,且a>b,則|a|和|b|的大小關係如何?
Back
無法判斷,因為如果a和b都是負數,則|a|可能小於|b|。
5.
FLASHCARD QUESTION
Front
絕對值小於11的整數有幾個?
Back
有23個整數,範圍是-10到10。
6.
FLASHCARD QUESTION
Front
如果|甲數|<5,那麼滿足此條件的甲數有多少個?
Back
有無限多個,因為甲數可以是任何在-5和5之間的數。
7.
FLASHCARD QUESTION
Front
班上平均身高165公分,若小琦身高161公分,則小琦與班上平均身高的差是多少?
Back
小琦比班上平均身高矮4公分。
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