p14 兩數相乘,同號得_

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Quiz
•
Mathematics
•
7th Grade
•
Medium
hang ku
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23 questions
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1.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
2.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
p14 兩數相乘,同號得正,異號得_,且積的絕對值等於乘數的積的絕對值
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
任何數與0相乘,都得_
0
1
-1
2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
乘積是_的兩個數互為倒數
0
1
-1
2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1
0
a
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
p16 兩個數相乘,交換乘數的位置,積不變,即ab=
a(bc)
(ab)c
abc
ba
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
三個數相乘,先把前兩個數相乘,或者先把後兩個數相乘,積不變,即(ab)c=
a(bc)
(ab)c
abc
ba
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