中學MATHS... @ ccf83dy60d的部落格

標題:

中學MATHS...

發問:

M= -2 N =4 1. 2M-N = 2. 5(4M+N) = 3. 1overM - 1overN 4. M(4+N) over N(2-m) 5. -48 over -12 6. -72 over -36 7. 56除(-4)除 2 又 1 over 3 8. 0 over 0 9. (+4) x (+2.2) 10. (-11)(+4) 11. (-4.2)(2) 12. (-1)(-1) 13. (- 1又 2over5)(-5) 14. (-1)(2)(-3) 15. (5)(-2)(-1)(7)

最佳解答:

M= -2 N =4 1. 2M-N =2(-2)-4 =-4-4 =-8 2. 5(4M+N) =5[4(-2)+4] =5(-8+4) =5(-4) =-20 3. 1overM - 1overN =1over-2 - 1over4 = - 1over4 4. M(4+N) over N(2-m) =-2(4+4) over 4[2- (-2)] =-2(8) over 4(4) =-16 over 16 =-1 5. -48 over -12 =4 6. -72 over -36 =2 7. 56除(-4)除 2 又 1 over 3 =14除2 又 1 over 3 =6 8. 0 over 0 =0 9. (+4) x (+2.2) =8.8 10. (-11)(+4) =-44 11. (-4.2)(2) =-8.4 12. (-1)(-1) =1 13. (- 1又 2over5)(-5) =7 14. (-1)(2)(-3) =-2 x -3 =6 15. (5)(-2)(-1)(7) =(-10)(-1)(7) =10(7) =70

其他解答:

1. -8 2. -20 3. -0.75 4. -1 5. 4 6. 2 7. -6 8. -E- 9. 8.8 10. -44 11. -8.4 12. 1 13. 7 14. 6 15. 70|||||1. -8 2. -20 3. 1/-2-1/4 =-3/4 4. -2(8)-1/4 -16.25 5. 4 6. 2 7. -14/(7/3) =-6 8. Infinity 9. 8.8 10. -44 11. -8.4 12. 1 13 7 14 6 15 70 2007-08-08 17:50:23 補充： If you want the steps of some questions, you can write there. 2007-08-08 23:08:44 補充： Actually, you can use your calculator. Save time.