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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 290 · 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. 1.52 + 40 + 19 + 17 =
  2. 2.41 + 83 + 72 + 55 =
  3. 3.82 + 84 + 81 + 20 =
  4. 4.34 + 26 + 46 + 67 =
  5. 5.80 + 80 + 25 + 33 =
  6. 6.87 + 26 + 29 + 35 =
  7. 7.74 + 67 + 30 + 22 =
  8. 8.79 + 12 + 14 + 29 =
  9. 9.66 + 26 + 25 + 31 =
  10. 10.60 + 73 + 66 + 14 =
  11. 11.84 + 22 + 65 + 74 =
  12. 12.60 + 25 + 19 + 32 =
  13. 13.33 + 70 + 73 + 84 =
  14. 14.61 + 47 + 55 + 43 =
  15. 15.85 + 25 + 64 + 26 =
  16. 16.15 + 25 + 30 + 24 =
  17. 17.47 + 58 + 76 + 74 =
  18. 18.56 + 78 + 83 + 64 =
  19. 19.62 + 83 + 12 + 74 =
  20. 20.18 + 74 + 69 + 76 =
  21. 21.11 + 72 + 13 + 46 =
  22. 22.87 + 29 + 41 + 48 =
  23. 23.13 + 38 + 33 + 37 =
  24. 24.32 + 31 + 71 + 67 =
  25. 25.13 + 16 + 17 + 73 =
  26. 26.39 + 79 + 19 + 35 =
  27. 27.52 + 29 + 80 + 32 =
  28. 28.37 + 77 + 30 + 32 =
  29. 29.68 + 61 + 13 + 36 =
  30. 30.89 + 29 + 84 + 67 =
  31. 31.76 + 15 + 30 + 40 =
  32. 32.79 + 25 + 89 + 48 =
  33. 33.71 + 66 + 31 + 72 =
  34. 34.68 + 38 + 21 + 30 =
  35. 35.71 + 40 + 61 + 66 =
  36. 36.61 + 79 + 87 + 48 =
  37. 37.86 + 47 + 89 + 47 =
  38. 38.21 + 79 + 49 + 22 =
  39. 39.67 + 83 + 29 + 27 =
  40. 40.15 + 38 + 74 + 64 =

Answer key

  1. 128
  2. 251
  3. 267
  4. 173
  5. 218
  6. 177
  7. 193
  8. 134
  9. 148
  10. 213
  11. 245
  12. 136
  13. 260
  14. 206
  15. 200
  16. 94
  17. 255
  18. 281
  19. 231
  20. 237
  21. 142
  22. 205
  23. 121
  24. 201
  25. 119
  26. 172
  27. 193
  28. 176
  29. 178
  30. 269
  31. 161
  32. 241
  33. 240
  34. 157
  35. 238
  36. 275
  37. 269
  38. 171
  39. 206
  40. 191

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