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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 521 · 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. 1.24 + 19 + 22 + 16 =
  2. 2.76 + 75 + 23 + 28 =
  3. 3.71 + 80 + 11 + 63 =
  4. 4.22 + 47 + 41 + 14 =
  5. 5.59 + 79 + 26 + 85 =
  6. 6.51 + 69 + 49 + 22 =
  7. 7.11 + 39 + 72 + 29 =
  8. 8.61 + 25 + 56 + 28 =
  9. 9.51 + 26 + 25 + 27 =
  10. 10.22 + 56 + 51 + 68 =
  11. 11.13 + 33 + 64 + 30 =
  12. 12.20 + 24 + 49 + 60 =
  13. 13.47 + 14 + 30 + 29 =
  14. 14.55 + 79 + 51 + 81 =
  15. 15.19 + 35 + 37 + 66 =
  16. 16.79 + 52 + 36 + 74 =
  17. 17.81 + 32 + 63 + 54 =
  18. 18.31 + 54 + 21 + 30 =
  19. 19.89 + 87 + 57 + 40 =
  20. 20.81 + 27 + 66 + 28 =
  21. 21.37 + 16 + 51 + 34 =
  22. 22.43 + 84 + 16 + 62 =
  23. 23.17 + 32 + 25 + 77 =
  24. 24.14 + 29 + 32 + 49 =
  25. 25.60 + 65 + 45 + 42 =
  26. 26.67 + 86 + 31 + 75 =
  27. 27.22 + 70 + 63 + 29 =
  28. 28.64 + 14 + 79 + 68 =
  29. 29.77 + 88 + 81 + 64 =
  30. 30.89 + 11 + 18 + 29 =
  31. 31.76 + 19 + 19 + 37 =
  32. 32.72 + 12 + 19 + 29 =
  33. 33.55 + 59 + 38 + 45 =
  34. 34.82 + 54 + 11 + 66 =
  35. 35.84 + 14 + 82 + 74 =
  36. 36.14 + 28 + 16 + 12 =
  37. 37.76 + 75 + 78 + 32 =
  38. 38.48 + 75 + 31 + 54 =
  39. 39.45 + 13 + 23 + 26 =
  40. 40.40 + 43 + 85 + 87 =

Answer key

  1. 81
  2. 202
  3. 225
  4. 124
  5. 249
  6. 191
  7. 151
  8. 170
  9. 129
  10. 197
  11. 140
  12. 153
  13. 120
  14. 266
  15. 157
  16. 241
  17. 230
  18. 136
  19. 273
  20. 202
  21. 138
  22. 205
  23. 151
  24. 124
  25. 212
  26. 259
  27. 184
  28. 225
  29. 310
  30. 147
  31. 151
  32. 132
  33. 197
  34. 213
  35. 254
  36. 70
  37. 261
  38. 208
  39. 107
  40. 255

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