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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 57 · 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. 1.81 + 66 + 15 + 70 =
  2. 2.82 + 73 + 16 + 70 =
  3. 3.39 + 49 + 47 + 78 =
  4. 4.38 + 84 + 63 + 69 =
  5. 5.68 + 11 + 21 + 75 =
  6. 6.59 + 72 + 52 + 65 =
  7. 7.46 + 85 + 84 + 25 =
  8. 8.66 + 36 + 89 + 45 =
  9. 9.26 + 48 + 13 + 35 =
  10. 10.50 + 86 + 63 + 77 =
  11. 11.28 + 63 + 18 + 24 =
  12. 12.43 + 48 + 66 + 83 =
  13. 13.83 + 39 + 27 + 30 =
  14. 14.85 + 82 + 43 + 39 =
  15. 15.22 + 45 + 47 + 15 =
  16. 16.42 + 78 + 18 + 78 =
  17. 17.16 + 78 + 76 + 85 =
  18. 18.58 + 84 + 19 + 85 =
  19. 19.33 + 54 + 67 + 27 =
  20. 20.24 + 54 + 50 + 19 =
  21. 21.78 + 48 + 66 + 56 =
  22. 22.22 + 66 + 30 + 67 =
  23. 23.14 + 79 + 84 + 38 =
  24. 24.88 + 43 + 14 + 70 =
  25. 25.13 + 37 + 32 + 21 =
  26. 26.30 + 24 + 28 + 64 =
  27. 27.82 + 47 + 60 + 21 =
  28. 28.66 + 11 + 24 + 42 =
  29. 29.57 + 46 + 82 + 58 =
  30. 30.64 + 66 + 83 + 60 =
  31. 31.28 + 54 + 18 + 72 =
  32. 32.71 + 50 + 85 + 83 =
  33. 33.12 + 77 + 29 + 67 =
  34. 34.13 + 19 + 34 + 31 =
  35. 35.12 + 40 + 84 + 43 =
  36. 36.23 + 21 + 17 + 87 =
  37. 37.83 + 39 + 45 + 17 =
  38. 38.47 + 17 + 38 + 14 =
  39. 39.73 + 49 + 35 + 61 =
  40. 40.12 + 14 + 77 + 17 =

Answer key

  1. 232
  2. 241
  3. 213
  4. 254
  5. 175
  6. 248
  7. 240
  8. 236
  9. 122
  10. 276
  11. 133
  12. 240
  13. 179
  14. 249
  15. 129
  16. 216
  17. 255
  18. 246
  19. 181
  20. 147
  21. 248
  22. 185
  23. 215
  24. 215
  25. 103
  26. 146
  27. 210
  28. 143
  29. 243
  30. 273
  31. 172
  32. 289
  33. 185
  34. 97
  35. 179
  36. 148
  37. 184
  38. 116
  39. 218
  40. 120

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