expressions to 1-100 using only 1,4,8,9

you use the numbers 1,4,8,9 to make expressions that equal numbers 1-100
in Other Math Topics by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

2 Answers

Some of these expressions use the factorial function n! (4!=1*2*3*4=24) and the nCr function, which gives the number of combinations of r objects from n different objects, e.g., 8C4=8*7*6*5/4!=70. The expressions below do not necessarily show the only way to arrive at the required result.

  1. (9-8)*1^4.......51. (4-1)(9+8)
  2. 4+8-1-9.........52. 41+8+sqrt(9)
  3. (4-1)(9-8)......53. 9(4+1)+8
  4. 1+4+8-9........54. 9*(8-4-1)!
  5. (4+1)(9-8).....55. (4+1)(8+sqrt(9))
  6. 1+4-8+9........56. 48+9-1
  7. 49/(8-1).........57. 98-41
  8. 1+9-(8/4).......58. 41+8+9
  9. 9((8/4)-1).......59. 91-4*8
  10. 9+(8/4)-1.......60. 8(9-1)-4
  11. 9*1+(8/4).......61. 8C4-9*1
  12. 8+9-1-4.........62. 8C4-9+1
  13. 8+9-1*4.........63. 9(8-1^4)
  14. 1-4+8+9........64. 8(9-1^4)
  15. 19+4-8..........65. 84-19
  16. 8+9-1^4........66. 81+9-4!
  17. (8+9)*1^4......67. 9*8-1-4
  18. 8+9+1^4........68. 81-4-9
  19. 9*8/4+1.........69. 9*8-4+1
  20. 4-1+8+9........70. 8C4*1^9
  21. 1*4+8+9........71. 9*8-1^4
  22. 1+4+8+9.......72. 9*8*1^4
  23. 4*8-1*9.........73. 9*8+1^4
  24. 8*9/(4-1).......74. 84-1-9
  25. (9+1)/(.8-.4)..75. 89-14
  26. 4!+9-8+1.......76. 84-9+1
  27. 9(8-4-1).........77. 9(8+1)-4
  28. 4*9-8*1..........78. 9/.1-8-4
  29. 4*9-8+1.........79. 91-8-4
  30. 1+9+8/.4.......80. 8(9+1^4)
  31. 8(4+1)-9........81. 9(8+1^4)
  32. 4*8*1^9.........82. (.9)/(.1^sqrt(4))-8
  33. 8(4-1)+9........83. 9(8+1)+sqrt(4)
  34. (9+8)/(.4+.1)..84. 89-1-4
  35. 9(8-4)-1.........85. 94-8-1
  36. 9(8-4)*1.........86. 81+9-4
  37. 4(8-1)+9........87. 91-8+4
  38. 19*8/4...........88. 9/.1-8/4
  39. 48-1*9...........89. 91-(8/4)
  40. 4*8-1+9.........90. (.9)/(.1^(8/4))
  41. 4*8+9*1.........91. (8-1)(4+9)
  42. 4*8+1+9........92. 84+9-1
  43. 4*9-1+8.........93. 98-1-4
  44. 4*9+8*1.........94. 84+1+9
  45. 4*9+1+8........95. 98-4+1
  46. 41+8-sqrt(9)..96. (4+8)(9-1)
  47. 48-1^9...........97. 98-1^4
  48. 48*1^9...........98. 98*1^4
  49. 8*(4+1)+9......99. 98+1^4
  50. 49+1^8........100. (1+9)^(8/4)

 

by Top Rated User (1.2m points)
  1. (9-8)*1^4.......51. (4-1)(9+8)
  2. 4+8-1-9.........52. 41+8+sqrt(9)
  3. (4-1)(9-8)......53. 9(4+1)+8
  4. 1+4+8-9........54. 9*(8-4-1)!
  5. (4+1)(9-8).....55. (4+1)(8+sqrt(9))
  6. 1+4-8+9........56. 48+9-1
  7. 49/(8-1).........57. 98-41
  8. 1+9-(8/4).......58. 41+8+9
  9. 9((8/4)-1).......59. 91-4*8
  10. 9+(8/4)-1.......60. 8(9-1)-4
  11. 9*1+(8/4).......61. 8C4-9*1
  12. 8+9-1-4.........62. 8C4-9+1
  13. 8+9-1*4.........63. 9(8-1^4)
  14. 1-4+8+9........64. 8(9-1^4)
  15. 19+4-8..........65. 84-19
  16. 8+9-1^4........66. 81+9-4!
  17. (8+9)*1^4......67. 9*8-1-4
  18. 8+9+1^4........68. 81-4-9
  19. 9*8/4+1.........69. 9*8-4+1
  20. 4-1+8+9........70. 8C4*1^9
  21. 1*4+8+9........71. 9*8-1^4
  22. 1+4+8+9.......72. 9*8*1^4
  23. 4*8-1*9.........73. 9*8+1^4
  24. 8*9/(4-1).......74. 84-1-9
  25. (9+1)/(.8-.4)..75. 89-14
  26. 4!+9-8+1.......76. 84-9+1
  27. 9(8-4-1).........77. 9(8+1)-4
  28. 4*9-8*1..........78. 9/.1-8-4
  29. 4*9-8+1.........79. 91-8-4
  30. 1+9+8/.4.......80. 8(9+1^4)
  31. 8(4+1)-9........81. 9(8+1^4)
  32. 4*8*1^9.........82. (.9)/(.1^sqrt(4))-8
  33. 8(4-1)+9........83. 9(8+1)+sqrt(4)
  34. (9+8)/(.4+.1)..84. 89-1-4
  35. 9(8-4)-1.........85. 94-8-1
  36. 9(8-4)*1.........86. 81+9-4
  37. 4(8-1)+9........87. 91-8+4
  38. 19*8/4...........88. 9/.1-8/4
  39. 48-1*9...........89. 91-(8/4)
  40. 4*8-1+9.........90. (.9)/(.1^(8/4))
  41. 4*8+9*1.........91. (8-1)(4+9)
  42. 4*8+1+9........92. 84+9-1
  43. 4*9-1+8.........93. 98-1-4
  44. 4*9+8*1.........94. 84+1+9
  45. 4*9+1+8........95. 98-4+1
  46. 41+8-sqrt(9)..96. (4+8)(9-1)
  47. 48-1^9...........97. 98-1^4
  48. 48*1^9...........98. 98*1^4
  49. 8*(4+1)+9......99. 98+1^4
  50. 49+1^8........100. (1+9)^(8/4)
by
reshown by

Related questions

1 answer
please solve : 100÷50•2
asked Feb 28, 2015 in Pre-Algebra Answers by lovelymath Level 2 User (1.9k points) | 853 views
1 answer
how do you get the sum 99 by using 1,9,9,6
asked Jan 14, 2013 in order of operations by anonymous | 804 views
1 answer
to get 43 using 8,2,5,4
asked Nov 20, 2011 in order of operations by anonymous | 615 views
1 answer
12345=1 solve it by using the four signs (+,-,×,÷)
asked Aug 29, 2016 in Other Math Topics by Stephanie2000 Level 1 User (180 points) | 1.0k views
1 answer
12345=1 solve it by using the four signs (+,-,×,÷)
asked Aug 28, 2016 in Other Math Topics by Stephanie2000 Level 1 User (180 points) | 1.3k views
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!

Most popular questions within the last 3000 days

  1. 50+50-25X0+2+2= (19)
  2. it takes 10 road workers 5 days to complete a road repair when working 2 hours a day.Working at the same pace,how many days will it take 2 people working 5 hours a day to finish it? (3)
  3. Solve 15 -1(12÷4+1)? (4)
  4. 8:4(5+2) (3)
  5. How can i represent 1/3; 3/3; 7/3; 10/3 and 15/3 on a number line? (1)

Most popular tags

87,516 questions
100,289 answers
2,420 comments
742,520 users