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翰林國中數學1上CH1-3 正負數的乘除

Authored by 翰林數學 翰林數學

Mathematics

7th Grade

Used 67+ times

翰林國中數學1上CH1-3 正負數的乘除
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下列的四個運算規則,正確的有幾個?
(甲) a+(bc)=(ab)+ca+\left(b+c\right)=\left(a+b\right)+c 

(乙) (ab)c=a(bc)\left(a-b\right)-c=a-\left(b-c\right) 

(丙) (a×b)×c=a×(b×c)\left(a\times b\right)\times c=a\times\left(b\times c\right) 

(丁) (a÷b)÷c=a÷(b÷c)\left(a\div b\right)\div c=a\div\left(b\div c\right) 

0

1

2

3

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

已知數線上有 A(a)A\left(a\right)  B(b)B\left(b\right) 兩點,若 AA 點在原點右邊, BB 點在原點左邊,且 a=5\left|a\right|=5  b=3\left|b\right|=3 ,則 a×b=a\times b=? 

 1515  

 15-15  

 88  

 2-2  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下列哪一個式子與 370×998+370×2370\times998+370\times2 相等?

 370×1000370\times1000  

 370×998370\times998 

 740×998740\times998 

 370×998×2370\times998\times2  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

如果你將 (6)÷4\left(-6\right)\div4 的結果標示在數線上,那麼正確的位置是下列哪一個?

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Media Image
Media Image
Media Image

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 a>0a>0  b<0b<0 ,則下列何者為正數?

 abab  

 b÷ab\div a  

 aba-b  

 bab-a  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

若甲、乙兩數為相異負整數,則下列哪一個選項的運算結果必為負數?

×甲\times乙

÷乙\div甲

+甲+乙

甲-乙

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下列各選項的敘述,何者錯誤?

兩個同號數相乘的結果是正數

兩個異號數相乘的結果為負數

負數相乘四次為負數

正數連乘五次為正數

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