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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 9 · 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. 1.11 + 87 + 31 + 41 =
  2. 2.63 + 55 + 66 + 53 =
  3. 3.75 + 36 + 44 + 15 =
  4. 4.49 + 77 + 20 + 88 =
  5. 5.52 + 30 + 67 + 71 =
  6. 6.89 + 49 + 63 + 70 =
  7. 7.41 + 59 + 84 + 32 =
  8. 8.42 + 25 + 11 + 16 =
  9. 9.64 + 28 + 27 + 68 =
  10. 10.39 + 31 + 76 + 35 =
  11. 11.20 + 13 + 17 + 88 =
  12. 12.61 + 41 + 19 + 55 =
  13. 13.18 + 87 + 81 + 66 =
  14. 14.64 + 60 + 86 + 84 =
  15. 15.32 + 32 + 41 + 35 =
  16. 16.54 + 11 + 27 + 51 =
  17. 17.61 + 79 + 44 + 89 =
  18. 18.25 + 81 + 14 + 38 =
  19. 19.12 + 82 + 42 + 28 =
  20. 20.63 + 89 + 75 + 85 =
  21. 21.11 + 80 + 65 + 85 =
  22. 22.16 + 18 + 79 + 28 =
  23. 23.62 + 85 + 16 + 59 =
  24. 24.51 + 32 + 41 + 50 =
  25. 25.14 + 33 + 29 + 41 =
  26. 26.28 + 57 + 78 + 57 =
  27. 27.46 + 13 + 65 + 17 =
  28. 28.39 + 81 + 52 + 39 =
  29. 29.81 + 20 + 39 + 89 =
  30. 30.45 + 84 + 31 + 49 =
  31. 31.61 + 49 + 29 + 68 =
  32. 32.14 + 67 + 42 + 51 =
  33. 33.12 + 58 + 14 + 56 =
  34. 34.67 + 19 + 44 + 43 =
  35. 35.43 + 22 + 12 + 52 =
  36. 36.85 + 72 + 74 + 72 =
  37. 37.33 + 58 + 38 + 58 =
  38. 38.58 + 20 + 65 + 84 =
  39. 39.71 + 81 + 76 + 27 =
  40. 40.80 + 44 + 16 + 16 =

Answer key

  1. 170
  2. 237
  3. 170
  4. 234
  5. 220
  6. 271
  7. 216
  8. 94
  9. 187
  10. 181
  11. 138
  12. 176
  13. 252
  14. 294
  15. 140
  16. 143
  17. 273
  18. 158
  19. 164
  20. 312
  21. 241
  22. 141
  23. 222
  24. 174
  25. 117
  26. 220
  27. 141
  28. 211
  29. 229
  30. 209
  31. 207
  32. 174
  33. 140
  34. 173
  35. 129
  36. 303
  37. 187
  38. 227
  39. 255
  40. 156

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