1. 9-3= 8-2= 7-1= 6-1=
  2. 8-4= 7-3= 6-2= 5-1=
  3. 6-4= 5-3= 4-2= 3-1=
  4. 8-5= 7-4= 6-3= 5-2=
  5. 9-6= 8-5= 7-4= 6-3=
  6. 5-4= 4-3= 3-2= 2-1=
  7. 7-6= 6-5= 5-4= 4-3=
  8. 9-2= 8-1= 7-4= 6-3=
  9. 5-3= 4-2= 3-1= 2-1=
  10. 9-4= 8-3= 7-2= 6-1=
  11. 8-6= 7-5= 6-4= 5-3=
  12. 6-5= 5-4= 4-3= 3-2=
  13. 9-7= 8-6= 7-5= 6-4=
  14. 4-3= 3-2= 2-1= 1-1=
  15. 9-5= 8-4= 7-3= 6-2=
  16. 8-7= 7-6= 6-5= 5-4=
  17. 5-2= 4-1= 3-3= 2-2=
  18. 9-8= 8-7= 7-6= 6-5=
  19. 6-2= 5-1= 4-3= 3-2=
  20. 9-9= 8-8= 7-7= 6-6=
  21. 4-2= 3-1= 2-2= 1-1=
  22. 8-2= 7-1= 6-4= 5-3=
  23. 7-3= 6-2= 5-1= 4-1=
  24. 5-5= 4-4= 3-3= 2-2=
  25. 9-6= 8-5= 7-4= 6-3=
  26. 6-1= 5-2= 4-3= 3-2=
  27. 8-3= 7-2= 6-5= 5-4=
  28. 9-4= 8-3= 7-6= 6-5=
  29. 7-5= 6-4= 5-3= 4-2=
  30. 6-2= 5-3= 4-4= 3-1=
  31. 9-8= 8-7= 7-4= 6-5=
  32. 5-1= 4-2= 3-3= 2-1=
  33. 9-5= 8-4= 7-2= 6-3=
  34. 8-6= 7-4= 6-2= 5-1=
  35. 5-4= 4-3= 3-1= 2-1=
  36. 7-6= 6-5= 5-3= 4-2=
  37. 9-3= 8-2= 7-5= 6-4=
  38. 6-3= 5-2= 4-1= 3-1=
  39. 8-1= 7-6= 6-3= 5-2=
  40. 9-2= 8-1= 7-3= 6-2=
  41. 4-1= 3-2= 2-1= 1-1=
  42. 9-7= 8-6= 7-4= 6-3=
  43. 7-3= 6-1= 5-4= 4-2=
  44. 5-5= 4-3= 3-1= 2-1=
  45. 9-4= 8-3= 7-2= 6-1=
  46. 6-2= 5-3= 4-1= 3-1=
  47. 8-6= 7-5= 6-3= 5-2=
  48. 9-8= 8-7= 7-5= 6-4=
  49. 7-4= 6-3= 5-2= 4-1=
  50. 6-4= 5-3= 4-2= 3-1=
  51. 9-6= 8-5= 7-3= 6-2=
  52. 8-4= 7-3= 6-1= 5-2=
  53. 5-2= 4-1= 3-2= 2-1=
  54. 9-9= 8-8= 7-7= 6-6=
  55. 7-6= 6-5= 5-4= 4-3=
  56. 6-3= 5-2= 4-1= 3-2=
  57. 8-2= 7-1= 6-5= 5-4=
  58. 9-3= 8-2= 7-6= 6-5=
  59. 5-4= 4-3= 3-2= 2-1=
  60. 9-5= 8-4= 7-1= 6-3=
  61. 8-1= 7-6= 6-2= 5-3=
  62. 6-5= 5-4= 4-3= 3-2=
  63. 9-7= 8-6= 7-3= 6-2=
  64. 7-2= 6-1= 5-3= 4-2=
  65. 5-3= 4-2= 3-1= 2-1=
  66. 8-5= 7-4= 6-1= 5-2=
  67. 9-2= 8-1= 7-4= 6-3=
  68. 4-3= 3-2= 2-1= 1-1=
  69. 9-4= 8-3= 7-6= 6-5=
  70. 6-4= 5-3= 4-2= 3-1=
  71. 8-7= 7-6= 6-4= 5-3=
  72. 9-8= 8-7= 7-6= 6-5=
  73. 7-5= 6-4= 5-3= 4-2=
  74. 5-1= 4-2= 3-3= 2-2=
  75. 6-1= 5-2= 4-3= 3-2=
  76. 8-3= 7-2= 6-1= 5-4=
  77. 9-6= 8-5= 7-2= 6-4=
  78. 5-5= 4-4= 3-3= 2-2=
  79. 7-4= 6-3= 5-2= 4-1=
  80. 9-3= 8-2= 7-4= 6-5=
  81. 6-2= 5-1= 4-4= 3-3=
  82. 8-6= 7-5= 6-2= 5-3=
  83. 9-5= 8-4= 7-3= 6-2=
  84. 7-3= 6-1= 5-4= 4-2=
  85. 5-2= 4-1= 3-2= 2-1=
  86. 9-2= 8-1= 7-5= 6-4=
  87. 8-4= 7-3= 6-2= 5-1=
  88. 6-3= 5-2= 4-1= 3-1=
  89. 9-7= 8-6= 7-2= 6-1=
  90. 7-1= 6-5= 5-4= 4-3=
  91. 5-4= 4-3= 3-2= 2-1=
  92. 8-2= 7-1= 6-3= 5-4=
  93. 9-4= 8-3= 7-5= 6-6=
  94. 6-2= 5-1= 4-3= 3-2=
  95. 8-5= 7-4= 6-3= 5-2=
  96. 9-6= 8-5= 7-4= 6-3=
  97. 7-2= 6-1= 5-3= 4-2=
  98. 5-3= 4-2= 3-1= 2-1=
  99. 9-3= 8-2= 7-6= 6-5=
  100. 6-1= 5-2= 4-3= 3-2=
小学一年级下册20以内退位减法练习题(100道)

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