中一數學題~ 快 ~ 急 40點

1. (-2)(-6)
__________
(-5)(+4)(-9)

=12/180
1/15

2. (-8)^(負3分之1)x(正四分之1)^(-6)
=24 x -1/24
=-1

3. (-8)x2^64^(-1)
=-16^64^(-1)
=1/4

4. (-8)^(-2)+(+4)x(-6)
=4+(-24)
=-20

5. (-7)x[8-(-7)]
_____________
(+4-18)x(-5)
=-105/70
=-3/2

6. (+2)(+6)
=12

7. (+10)(+15)
=150

8. (+7)(-9)
=-63

9. (-5)(+20)
=-100

10. (-8)(-6)
=48

11. (-3)(-12)
=36

12. (+35)^(+5)
=7

13. (+48)^(-2)
=-24

14. (-32)^(+8)
=-4

15. (-24)^(-3)
=8

16. +126
________
-9
=-14

17. -242
_______
-11

=22

哇~好似好勁甘囉~

計之前....我想話你知，^ 係次方，唔係除....

1. (-2)(-6) / (-5)(+4)(-9)
= 12 / 180
= 1 / 15

2. (-8)/(負3分之1)x(正四分之1)/(-6)
= 24 x -1 / 24
= -1

3. (-8)x2 / 64 / (-1)
= 1 / 4

4. (-8) / (-2)+(+4)x(-6)
= 4 + (-24)
= - 20

5. (-7)x[8-(-7)] / (+4-18)x(-5)
= (-7)x 15 / (-14)x(-5)
= -105 / 70
= -1 又 1 / 2

6. (+2)(+6)
= 12

7. (+10)(+15)
= 150

8. (+7)(-9)
= -63

9. (-5)(+20)
= -100

10. (-8)(-6)
= 48

11. (-3)(-12)
= 36

12. (+35)/(+5)
= 7

13. (+48)/(-2)
= -24

14. (-32)/(+8)
= -4

15. (-24)/(-3)
= 8

16. +126 / -9
= -14

17. -242 / -11
= 22

1. (-2)(-6)
__________
(-5)(+4)(-9)
= -2x-6
_________
-5x+4x-9
= +12
_____
-20x-9
= +12
_____
+180
= +0.666666666666666666666666.......


2. (-8)^(負3分之1)x(正四分之1)^(-6)
= -8x負1分之3x正四分之1x負1分之6
= -1

3. (-8)x2^64^(-1)
= -8x2^64^-1
= -16^64^-1
= -0.25^-1
= +0.25

4. (-8)^(-2)+(+4)x(-6)
= -8^-2++4x-6
= +4+-24
= +4-24
= -20

5. (-7)x[8-(-7)]
___________
(+4-18)x(-5)
= (-7)x[8+7]
___________
+4-18x(-5)
= -7x15
______
-14x-5
= -105
______
+70
= -1.5

6. (+2)(+6)
= +2x+6
= +12

7. (+10)(+15)
= +10x+15
= +150

8. (+7)(-9)
= +7x-9
= -63

9. (-5)(+20)
= -5x+20
= -100

10. (-8)(-6)
= -8x-6
= +48

11. (-3)(-12)
= -3x-12
= +36

12. (+35)^(+5)
= +35^+5
= +7

13. (+48)^(-2)
= +48^-2
= -24

14. (-32)^(+8)
= -32^+8
= -4

15. (-24)^(-3)
= -24^-3
= +8

16. +126
________
-9
= -14

17. -242
_______
-11
= + 22