１）試運甪 1, -2, 3, -4組合出兩條結果為 24 的算式。
２）化簡下列各題。
２ａ）-4a + 9a + 5b - 3b
２ｂ）6x - 7 - (4x + 5)
３ ）化簡下列各題。
３ａ)（2a）x (-3a)
３ｂ）(-6x)除(-2x)
Help Me!!!送20點
2007-08-29 6:46 pm
回答 (8)
2007-08-29 6:52 pm
✔ 最佳答案
１）試運甪 1, -2, 3, -4組合出兩條結果為 24 的算式。Answer: [(-2) - 1 - 3] x (-4) = -6 x -4 = 24
Answer: 1 x (-2) x 3 x (-4) = 24
２ａ）-4a + 9a + 5b - 3b
Answer: 5a + 2b
２ｂ）6x - 7 - (4x + 5)
Answer: 2x - 2
３ａ)（2a）x (-3a)
Answer: -6a²
３ｂ）(-6x)除(-2x)
Answer: 3
2007-08-29 10:53:38 補充：
Answer to 2b should be 2x - 12
2007-08-29 10:54:30 補充：
6x - 7 - (4x 5)= 6x - 7 - 4x - 5= 2x - 12
2007-08-30 2:20 am
１）試運甪 1, -2, 3, -4組合出兩條結果為 24 的算式。
＝ [(-2) - 1 - 3] x (-4) = -6 x -4 = 24
＝ 1 x (-2) x 3 x (-4) = 24
２ａ）-4a + 9a + 5b - 3b＝ 5a + 2b
２ｂ）6x - 7 - (4x + 5)＝ 2x - 2
３ａ)（2a）x (-3a)＝-6a²
３ｂ）(-6x)除(-2x) ＝ 3
＝ [(-2) - 1 - 3] x (-4) = -6 x -4 = 24
＝ 1 x (-2) x 3 x (-4) = 24
２ａ）-4a + 9a + 5b - 3b＝ 5a + 2b
２ｂ）6x - 7 - (4x + 5)＝ 2x - 2
３ａ)（2a）x (-3a)＝-6a²
３ｂ）(-6x)除(-2x) ＝ 3
參考: me
2007-08-30 1:00 am
2a) +5a+2b
2b) +2x-13
3a) -6a^2
3b) 3
2b) +2x-13
3a) -6a^2
3b) 3
2007-08-29 8:02 pm
1)
(-4) x 1 x (-2) x 3
( 1 + 3 - (-2) ) x 4
2a.) -4a + 9a + 5b - 3b
= 9a - 4a + 5b - 3b
= 5a + 2b
2b.) 6x - 7 - ( 4x + 5 )
= 6x - 7 - 4x - 5
=2x - 12
3a.) ( 2a ) x ( 3a )
= 6a^2
3b.) ( -6x ) / ( -2x )
= 6x / 2x
= 6 / 2
= 3
(-4) x 1 x (-2) x 3
( 1 + 3 - (-2) ) x 4
2a.) -4a + 9a + 5b - 3b
= 9a - 4a + 5b - 3b
= 5a + 2b
2b.) 6x - 7 - ( 4x + 5 )
= 6x - 7 - 4x - 5
=2x - 12
3a.) ( 2a ) x ( 3a )
= 6a^2
3b.) ( -6x ) / ( -2x )
= 6x / 2x
= 6 / 2
= 3
參考: me
2007-08-29 6:59 pm
1. -2 x -4 x 3 x 1 = 24
2a. 5A + 2B
2b. 2X - 12
3a. -6a 2忄
3b. 3
2a. 5A + 2B
2b. 2X - 12
3a. -6a 2忄
3b. 3
參考: 問題1不可能有2條算式吧^^
2007-08-29 6:58 pm
１） (3 x -4)(1 x -2)
= -12 x -2
= 24
(1 x -4)(-2 x 3)
= -4 x -6
= 24
２ａ） -4a + 9a + 5b - 3b
= 5a + 2b
２ｂ）6x - 7 - (4x + 5)
=6x - 7 - 4x - 5
=2x - 12
=x-6
３ａ)（2a）x (-3a)
=6a^2
３ｂ）(-6x)除(-2x)
=3
= -12 x -2
= 24
(1 x -4)(-2 x 3)
= -4 x -6
= 24
２ａ） -4a + 9a + 5b - 3b
= 5a + 2b
２ｂ）6x - 7 - (4x + 5)
=6x - 7 - 4x - 5
=2x - 12
=x-6
３ａ)（2a）x (-3a)
=6a^2
３ｂ）(-6x)除(-2x)
=3
參考: 自己~~
2007-08-29 6:54 pm
1)
1*-2*3*-4
= -2*3*-4
= -6*-4
= 24
2a.
-4a+9a+5b-3b
= 5a-2b
2b.
6x - 7 - (4x+5)
= 6x - 7 - 4x - 5
= 2x - 12
1)
1*-2*3*-4
= -2*3*-4
= -6*-4
= 24
2a.
-4a+9a+5b-3b
= 5a-2b
2b.
6x - 7 - (4x+5)
= 6x - 7 - 4x - 5
= 2x - 12
3a.
2a*-3a
= -6a^2
3b..
-6x/-2x
= 3
2a*-3a
= -6a^2
3b..
-6x/-2x
= 3
1*-2*3*-4
= -2*3*-4
= -6*-4
= 24
2a.
-4a+9a+5b-3b
= 5a-2b
2b.
6x - 7 - (4x+5)
= 6x - 7 - 4x - 5
= 2x - 12
1)
1*-2*3*-4
= -2*3*-4
= -6*-4
= 24
2a.
-4a+9a+5b-3b
= 5a-2b
2b.
6x - 7 - (4x+5)
= 6x - 7 - 4x - 5
= 2x - 12
3a.
2a*-3a
= -6a^2
3b..
-6x/-2x
= 3
2a*-3a
= -6a^2
3b..
-6x/-2x
= 3
2007-08-29 6:50 pm
１）試運甪 1, -2, 3, -4組合出兩條結果為 24 的算式。
=(-4--2+1)+3
=(-4--2+1)+3
收錄日期: 2021-04-24 09:28:38
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