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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 229 · 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. 1.35 + 72 + 17 + 11 =
  2. 2.42 + 37 + 51 + 11 =
  3. 3.13 + 36 + 77 + 43 =
  4. 4.81 + 24 + 68 + 65 =
  5. 5.19 + 71 + 24 + 81 =
  6. 6.53 + 36 + 20 + 44 =
  7. 7.34 + 39 + 30 + 58 =
  8. 8.28 + 48 + 26 + 21 =
  9. 9.87 + 77 + 49 + 77 =
  10. 10.54 + 75 + 37 + 71 =
  11. 11.54 + 15 + 29 + 77 =
  12. 12.22 + 83 + 18 + 53 =
  13. 13.41 + 53 + 85 + 68 =
  14. 14.33 + 31 + 28 + 29 =
  15. 15.32 + 75 + 21 + 29 =
  16. 16.16 + 36 + 80 + 85 =
  17. 17.27 + 65 + 39 + 26 =
  18. 18.16 + 44 + 25 + 22 =
  19. 19.79 + 85 + 76 + 89 =
  20. 20.71 + 12 + 12 + 11 =
  21. 21.82 + 83 + 78 + 72 =
  22. 22.15 + 32 + 62 + 58 =
  23. 23.84 + 51 + 11 + 84 =
  24. 24.11 + 18 + 68 + 55 =
  25. 25.47 + 70 + 23 + 33 =
  26. 26.32 + 47 + 15 + 52 =
  27. 27.81 + 66 + 71 + 70 =
  28. 28.89 + 41 + 60 + 15 =
  29. 29.82 + 33 + 36 + 34 =
  30. 30.85 + 15 + 44 + 37 =
  31. 31.77 + 82 + 79 + 31 =
  32. 32.21 + 47 + 49 + 52 =
  33. 33.75 + 76 + 60 + 24 =
  34. 34.41 + 64 + 48 + 36 =
  35. 35.46 + 23 + 76 + 48 =
  36. 36.82 + 47 + 49 + 85 =
  37. 37.21 + 82 + 66 + 62 =
  38. 38.46 + 55 + 63 + 17 =
  39. 39.14 + 58 + 39 + 86 =
  40. 40.22 + 84 + 72 + 56 =

Answer key

  1. 135
  2. 141
  3. 169
  4. 238
  5. 195
  6. 153
  7. 161
  8. 123
  9. 290
  10. 237
  11. 175
  12. 176
  13. 247
  14. 121
  15. 157
  16. 217
  17. 157
  18. 107
  19. 329
  20. 106
  21. 315
  22. 167
  23. 230
  24. 152
  25. 173
  26. 146
  27. 288
  28. 205
  29. 185
  30. 181
  31. 269
  32. 169
  33. 235
  34. 189
  35. 193
  36. 263
  37. 231
  38. 181
  39. 197
  40. 234

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