請列式
1) (+3)x(-7)
=?
2) (-13)(-2)
=?
3) (-6)(3分2)
=?
4) (-4)x(-5)x(-6)
=?
5) (-10)(-2)(-7)
=?
中一數學題一問
2007-09-27 4:30 am
回答 (5)
2007-09-27 4:35 am
✔ 最佳答案
1) (+3)x(-7)= -(3x7)
= -21
2) (-13)(-2)
= +(13*2)
= +26
3) (-6)(3分2)
= -(6x3分2)
= -4
4) (-4)x(-5)x(-6)
= -(4x5x6)
= -(20x6)
= -120
5) (-10)(-2)(-7)
= -(10x2x7)
= -(20x7)
= -140
參考: 我
2007-10-04 3:30 pm
(+3)x(-7)
=(3)x(-7)-----------負正得負
=-21
(-13)(-2)
=+26------------負負得正
=26
(-6)(3分2)
=(-6)(2/3)
=-18/3
=-6--------------負正得負
(-4)x(-5)x(-6)
=[(-4)x(-5)]x(-6)
=+20x(-6)-----------負負得正
=-120----------------負正得負
(-10)(-2)(-7)
=+20(-7)-------------負負得正
=-140-----------------負正得負
=(3)x(-7)-----------負正得負
=-21
(-13)(-2)
=+26------------負負得正
=26
(-6)(3分2)
=(-6)(2/3)
=-18/3
=-6--------------負正得負
(-4)x(-5)x(-6)
=[(-4)x(-5)]x(-6)
=+20x(-6)-----------負負得正
=-120----------------負正得負
(-10)(-2)(-7)
=+20(-7)-------------負負得正
=-140-----------------負正得負
2007-09-27 4:46 am
1) 21
2) 26
3) -4
4) -120
5) -140
2) 26
3) -4
4) -120
5) -140
2007-09-27 4:40 am
1) (+3)x(-7)
=-(3x7)
=-21
2) (-13)(-2)
=+(13x2)
=+26
3) (-6)(3分2)
=-(6x2/3)
=-4
4) (-4)x(-5)x(-6)
=-(4x5x6)
=-120
5) (-10)(-2)(-7)
=-(10x2x7) =-140
=-(3x7)
=-21
2) (-13)(-2)
=+(13x2)
=+26
3) (-6)(3分2)
=-(6x2/3)
=-4
4) (-4)x(-5)x(-6)
=-(4x5x6)
=-120
5) (-10)(-2)(-7)
=-(10x2x7) =-140
參考: me
2007-09-27 4:38 am
1) (+3)x(-7)
=-21
2) (-13)(-2)
=26
3) (-6)(3分2)
=-4
4) (-4)x(-5)x(-6)
=-120
5) (-10)(-2)(-7)
=-140
=-21
2) (-13)(-2)
=26
3) (-6)(3分2)
=-4
4) (-4)x(-5)x(-6)
=-120
5) (-10)(-2)(-7)
=-140
參考: 我的腦袋
收錄日期: 2021-04-18 23:25:02
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