1. ( + 3 ) + ( - 4 ) = ?
2. ( - 7 ) + ( - 6 ) = ?
3. ( + 18 ) + ( +123 ) = ?
4. ( + 71 ) - ( + 23 ) = ?
5. ( - 45 ) + ( - 6 ) = ?
6. ( - 45 ) + ( - 6 ) = ?
7. ( + 1 ) - ( + 6 ) - ( + 2) - ( + 3 ) = ?
8. (+ 2.2) - ( + 1.7 ) - ( -2.5 ) = ?
9.( + 620 ) - ( - 124 ) = ?
thank you ^^ !!
數學題!!
2007-09-09 2:44 am
回答 (9)
2007-09-09 5:20 am
1. -1
2. -13
3. 141
4. 48
5. -51
6 -51
7. -10
8. 3
9. 744
2. -13
3. 141
4. 48
5. -51
6 -51
7. -10
8. 3
9. 744
2007-09-09 2:57 am
1.( + 3 ) + ( - 4 )
= 3 - 4
= - 1
2.( - 7 ) + ( - 6 )
= - 7 - 6
= - 13
3.( + 18 ) + ( +123 )
= 18 + 123
= 141
4.( + 71 ) - ( + 23 )
= 71 - 23
= 48
5.( - 45 ) + ( - 6 )
= - 45 - 6
= - 51
6.( - 45 ) + ( - 6 )
= - 45 - 6
= - 51
7.( + 1 ) - ( + 6 ) - ( + 2) - ( + 3 )
= 1 - 6 - 2 - 3
= - 10
8.( + 2.2) - ( + 1.7 ) - ( - 2.5 )
= 2.2 - 1.7 + 2.5
=3
9.( + 620 ) - ( - 124 )
= 620 + 124
=744
Tips( a means a number):
- ( +a ) = - a - ( -a ) = a
+( a ) = a +( -a ) = - a
= 3 - 4
= - 1
2.( - 7 ) + ( - 6 )
= - 7 - 6
= - 13
3.( + 18 ) + ( +123 )
= 18 + 123
= 141
4.( + 71 ) - ( + 23 )
= 71 - 23
= 48
5.( - 45 ) + ( - 6 )
= - 45 - 6
= - 51
6.( - 45 ) + ( - 6 )
= - 45 - 6
= - 51
7.( + 1 ) - ( + 6 ) - ( + 2) - ( + 3 )
= 1 - 6 - 2 - 3
= - 10
8.( + 2.2) - ( + 1.7 ) - ( - 2.5 )
= 2.2 - 1.7 + 2.5
=3
9.( + 620 ) - ( - 124 )
= 620 + 124
=744
Tips( a means a number):
- ( +a ) = - a - ( -a ) = a
+( a ) = a +( -a ) = - a
參考: me
2007-09-09 2:57 am
1. -1
2. -13
3. 141
4. 48
5. -51
6. -51
7.-10
8. 2
9. 744
2. -13
3. 141
4. 48
5. -51
6. -51
7.-10
8. 2
9. 744
2007-09-09 2:54 am
1. ( + 3 ) + ( - 4 ) = 3 - 4 = -1
2. ( - 7 ) + ( - 6 ) = - 7 - 6 = -13
3. ( + 18 ) + ( +123 ) = 18 + 123 = 141
4. ( + 71 ) - ( + 23 ) = 17 - 23 = -6
5. ( - 45 ) + ( - 6 ) = - 45 - 6 = -51
6. ( - 45 ) + ( - 6 ) = -45 - 6 = -51 (Repeated)
7. ( + 1 ) - ( + 6 ) - ( + 2) - ( + 3 ) = 1 - 6 - 2 - 3 = -10
8. (+ 2.2) - ( + 1.7 ) - ( -2.5 ) = 2.2 - 1.7 + 2.5 = 3
9.( + 620 ) - ( - 124 ) = 620 + 124 = 744
2. ( - 7 ) + ( - 6 ) = - 7 - 6 = -13
3. ( + 18 ) + ( +123 ) = 18 + 123 = 141
4. ( + 71 ) - ( + 23 ) = 17 - 23 = -6
5. ( - 45 ) + ( - 6 ) = - 45 - 6 = -51
6. ( - 45 ) + ( - 6 ) = -45 - 6 = -51 (Repeated)
7. ( + 1 ) - ( + 6 ) - ( + 2) - ( + 3 ) = 1 - 6 - 2 - 3 = -10
8. (+ 2.2) - ( + 1.7 ) - ( -2.5 ) = 2.2 - 1.7 + 2.5 = 3
9.( + 620 ) - ( - 124 ) = 620 + 124 = 744
2007-09-09 2:51 am
1.-4
2.-13
3.141
4.48
5.-51
6.-51
7.-10
8.2.7
9.744
2.-13
3.141
4.48
5.-51
6.-51
7.-10
8.2.7
9.744
2007-09-09 2:49 am
1.-4
2.-13
3.141
4.48
5.-51
6.-51
7.-10
8.2.7
9.744
2007-09-08 18:51:50 補充：
第8條應該係3
2007-09-08 18:53:39 補充：
leunghoyeung2004計錯第1條.mkvx1234計錯最後1條.
2.-13
3.141
4.48
5.-51
6.-51
7.-10
8.2.7
9.744
2007-09-08 18:51:50 補充：
第8條應該係3
2007-09-08 18:53:39 補充：
leunghoyeung2004計錯第1條.mkvx1234計錯最後1條.
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