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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 512 · 40 questions
TalentJR

The fast method (Keep a running total): Start with the first number. Add the tens of the next number, then its ones. Keep going until the list ends — only one total in your head at a time.

NameDateTime takenScore ___ / 40
  1. 1.17 + 26 + 75 + 22 =
  2. 2.69 + 60 + 80 + 45 =
  3. 3.58 + 83 + 86 + 64 =
  4. 4.69 + 73 + 23 + 29 =
  5. 5.28 + 80 + 76 + 29 =
  6. 6.12 + 86 + 50 + 21 =
  7. 7.77 + 12 + 59 + 22 =
  8. 8.28 + 52 + 17 + 65 =
  9. 9.26 + 69 + 13 + 32 =
  10. 10.17 + 43 + 33 + 17 =
  11. 11.14 + 22 + 49 + 14 =
  12. 12.72 + 17 + 35 + 53 =
  13. 13.49 + 66 + 87 + 11 =
  14. 14.70 + 59 + 13 + 38 =
  15. 15.14 + 35 + 27 + 73 =
  16. 16.41 + 34 + 88 + 17 =
  17. 17.14 + 21 + 76 + 63 =
  18. 18.51 + 55 + 69 + 68 =
  19. 19.27 + 89 + 51 + 49 =
  20. 20.17 + 85 + 79 + 39 =
  21. 21.13 + 25 + 58 + 77 =
  22. 22.39 + 77 + 19 + 27 =
  23. 23.45 + 74 + 44 + 17 =
  24. 24.29 + 81 + 70 + 86 =
  25. 25.62 + 59 + 67 + 13 =
  26. 26.11 + 74 + 58 + 54 =
  27. 27.24 + 53 + 72 + 85 =
  28. 28.78 + 46 + 35 + 45 =
  29. 29.31 + 73 + 76 + 70 =
  30. 30.13 + 29 + 32 + 59 =
  31. 31.22 + 15 + 52 + 69 =
  32. 32.12 + 35 + 77 + 81 =
  33. 33.77 + 43 + 41 + 89 =
  34. 34.45 + 86 + 84 + 23 =
  35. 35.20 + 39 + 56 + 53 =
  36. 36.19 + 28 + 81 + 23 =
  37. 37.56 + 44 + 65 + 83 =
  38. 38.84 + 46 + 71 + 15 =
  39. 39.74 + 21 + 57 + 15 =
  40. 40.53 + 37 + 20 + 65 =

Answer key

  1. 140
  2. 254
  3. 291
  4. 194
  5. 213
  6. 169
  7. 170
  8. 162
  9. 140
  10. 110
  11. 99
  12. 177
  13. 213
  14. 180
  15. 149
  16. 180
  17. 174
  18. 243
  19. 216
  20. 220
  21. 173
  22. 162
  23. 180
  24. 266
  25. 201
  26. 197
  27. 234
  28. 204
  29. 250
  30. 133
  31. 158
  32. 205
  33. 250
  34. 238
  35. 168
  36. 151
  37. 248
  38. 216
  39. 167
  40. 175

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