(完整版)十字相乘法练习题

十字相乘法习题

22221.x3x2 2.x6x5 3.x12x11 4.x18x17

22225.x4x3 6.x4x3 7.x2x3 8.x2x3

22229.x7x6 10.x5x6 11.xx6 12.xx6

2424213.2526aa 14.xx20 15.x6x8 16. x47x218

2222222217.x3xy2y 18. a9ab14b 19.ax7ax8 20.mn3mn10

22222223221. y13yb36b 22. a10a9 23. a4a12a 24. xy5xy6x

2225. (ab)4(ab)x3 26. (x2y)3(x2y)10 27. (x24x)27(x24x)12

2222228.(x3)4x 29.(x5x3)(x5x2)6 30.(x1)(x2)(x3)(x4)24

31. 2x2x3 32. 2x25x7 33. 3a22a1 34. 3b214b5

35.2x215x7 36. 3a28a4 37. 5x27x6 38. 6y211y10

39.12x213x3 40.4x224x27 41.5x26x8 42.2x23x1

43.6y213y6 44.3a27a6 45.4n24n15 46.6x2x35

247.5x28x13 48. 15x2x2 49.209y20y 50.5a2b223ab10

51. 3a2b217abxy10x2y2 52. 5x515x3y20xy2 53. 2x（x12）22

2254. 3(x2y)439(x2y)2108 55.x10xy25y6x30y8

54. 3x2y217abxy10a2b2 55. (3x22x1)2(2x23x3)2