1.考慮數式{-1}x{-1}x{-1}x……x{-1}。若-1的數目為奇數,數式的値是多少?若-1的數目為偶數,數式的値是多少?簡述答案。
2.+4-{-4}=?
3.-8÷{+4}=?
4.{-9}+{+13}=?
5.{-15}x{-8}=?
6.{-8}-{+4}x{-2}=?
小六升中一數學問題超急!help!
2010-08-27 11:03 pm
回答 (4)
2010-08-27 11:24 pm
✔ 最佳答案
1.考慮數式{-1}x{-1}x{-1}x……x{-1}。若-1的數目為奇數,數式的値是多少?若-1的數目為偶數,數式的値是多少?簡述答案。數式的値是-1,因為{-1}x{-1}x{-1}的奇數的値是-1,{-1}x{-1}的偶數的値是1
2.+4-{-4}=8
3.-8÷{+4}=-2
4.{-9}+{+13}=4
5.{-15}x{-8}=120
6.{-8}-{+4}x{-2}=0
參考: ME
2010-08-27 11:28 pm
2. +4-{-4}= 8
3. -8÷{+4}= -2
4. {-9}+{+13}= 4
5. {-15}x{-8}= 120
6. {-8}-{+4}x{-2}= 0
2010-08-27 15:31:04 補充：
正正得正
負負得正
正負得負
負正得負
3. -8÷{+4}= -2
4. {-9}+{+13}= 4
5. {-15}x{-8}= 120
6. {-8}-{+4}x{-2}= 0
2010-08-27 15:31:04 補充：
正正得正
負負得正
正負得負
負正得負
參考: me, me
2010-08-27 11:25 pm
1)
若-1的數目為奇數,{-1}x{-1}x{-1} = -1 * 1 = -1
若-1的數目為偶數, (-1) * (-1) = 1*1 = 1
2)
+4 - (-4)
= 4 + 4
= 8
3)
(-8) / (+4)
= - 8 / 4
= - 2
4)
(-9) + (+13)
= 13 - 9
= 4
5)
(-15) * (-8)
= 15 * 8
= 120
6)
(-8) - (+4)x(-2)
= -8 + 8
= 0
++ = +
-- = +
+- = -
-+ = -
若-1的數目為奇數,{-1}x{-1}x{-1} = -1 * 1 = -1
若-1的數目為偶數, (-1) * (-1) = 1*1 = 1
2)
+4 - (-4)
= 4 + 4
= 8
3)
(-8) / (+4)
= - 8 / 4
= - 2
4)
(-9) + (+13)
= 13 - 9
= 4
5)
(-15) * (-8)
= 15 * 8
= 120
6)
(-8) - (+4)x(-2)
= -8 + 8
= 0
++ = +
-- = +
+- = -
-+ = -
參考: My Maths Knowledge
2010-08-27 11:23 pm
2. 8
3. -2
4. 4
5. 120
6. 0
3. -2
4. 4
5. 120
6. 0
收錄日期: 2021-04-13 17:28:44
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https://hk.answers.yahoo.com/question/index?qid=20100827000051KK00965