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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 820 · 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. 1.29 + 33 + 68 + 32 =
  2. 2.81 + 65 + 54 + 58 =
  3. 3.25 + 12 + 14 + 50 =
  4. 4.58 + 13 + 77 + 56 =
  5. 5.11 + 40 + 18 + 21 =
  6. 6.24 + 82 + 53 + 71 =
  7. 7.48 + 15 + 84 + 18 =
  8. 8.33 + 30 + 22 + 81 =
  9. 9.79 + 67 + 55 + 47 =
  10. 10.11 + 31 + 42 + 24 =
  11. 11.27 + 43 + 61 + 84 =
  12. 12.84 + 23 + 41 + 70 =
  13. 13.36 + 77 + 80 + 71 =
  14. 14.55 + 50 + 89 + 79 =
  15. 15.67 + 44 + 39 + 31 =
  16. 16.48 + 14 + 27 + 88 =
  17. 17.13 + 66 + 15 + 20 =
  18. 18.51 + 81 + 75 + 16 =
  19. 19.23 + 78 + 69 + 21 =
  20. 20.25 + 89 + 19 + 85 =
  21. 21.64 + 65 + 52 + 75 =
  22. 22.14 + 66 + 14 + 41 =
  23. 23.17 + 63 + 82 + 58 =
  24. 24.55 + 49 + 58 + 79 =
  25. 25.50 + 59 + 13 + 88 =
  26. 26.76 + 15 + 89 + 87 =
  27. 27.62 + 67 + 64 + 56 =
  28. 28.11 + 27 + 58 + 81 =
  29. 29.32 + 53 + 19 + 58 =
  30. 30.36 + 24 + 85 + 83 =
  31. 31.35 + 38 + 27 + 52 =
  32. 32.87 + 88 + 45 + 39 =
  33. 33.68 + 43 + 39 + 76 =
  34. 34.67 + 78 + 84 + 86 =
  35. 35.36 + 44 + 70 + 75 =
  36. 36.89 + 42 + 61 + 39 =
  37. 37.26 + 25 + 67 + 87 =
  38. 38.24 + 55 + 12 + 53 =
  39. 39.54 + 22 + 63 + 64 =
  40. 40.87 + 77 + 19 + 75 =

Answer key

  1. 162
  2. 258
  3. 101
  4. 204
  5. 90
  6. 230
  7. 165
  8. 166
  9. 248
  10. 108
  11. 215
  12. 218
  13. 264
  14. 273
  15. 181
  16. 177
  17. 114
  18. 223
  19. 191
  20. 218
  21. 256
  22. 135
  23. 220
  24. 241
  25. 210
  26. 267
  27. 249
  28. 177
  29. 162
  30. 228
  31. 152
  32. 259
  33. 226
  34. 315
  35. 225
  36. 231
  37. 205
  38. 144
  39. 203
  40. 258

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