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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 344 · 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. 1.12 + 63 + 19 + 75 =
  2. 2.53 + 27 + 63 + 72 =
  3. 3.59 + 66 + 89 + 62 =
  4. 4.79 + 39 + 23 + 46 =
  5. 5.80 + 57 + 83 + 31 =
  6. 6.46 + 24 + 71 + 26 =
  7. 7.34 + 50 + 17 + 76 =
  8. 8.71 + 35 + 38 + 29 =
  9. 9.29 + 49 + 25 + 69 =
  10. 10.30 + 62 + 12 + 77 =
  11. 11.29 + 47 + 41 + 21 =
  12. 12.16 + 11 + 87 + 46 =
  13. 13.56 + 48 + 29 + 55 =
  14. 14.68 + 72 + 78 + 12 =
  15. 15.14 + 58 + 54 + 50 =
  16. 16.80 + 67 + 81 + 45 =
  17. 17.72 + 46 + 86 + 36 =
  18. 18.48 + 30 + 65 + 52 =
  19. 19.72 + 61 + 24 + 56 =
  20. 20.34 + 40 + 12 + 41 =
  21. 21.60 + 44 + 27 + 33 =
  22. 22.46 + 62 + 75 + 12 =
  23. 23.26 + 31 + 26 + 21 =
  24. 24.12 + 41 + 16 + 19 =
  25. 25.39 + 58 + 72 + 56 =
  26. 26.79 + 24 + 23 + 33 =
  27. 27.89 + 36 + 69 + 58 =
  28. 28.62 + 78 + 42 + 80 =
  29. 29.66 + 39 + 15 + 54 =
  30. 30.32 + 76 + 23 + 36 =
  31. 31.42 + 17 + 71 + 13 =
  32. 32.39 + 46 + 70 + 85 =
  33. 33.46 + 64 + 14 + 71 =
  34. 34.51 + 49 + 81 + 55 =
  35. 35.17 + 18 + 63 + 23 =
  36. 36.52 + 75 + 55 + 51 =
  37. 37.45 + 12 + 33 + 82 =
  38. 38.51 + 12 + 52 + 29 =
  39. 39.50 + 85 + 34 + 19 =
  40. 40.20 + 86 + 77 + 46 =

Answer key

  1. 169
  2. 215
  3. 276
  4. 187
  5. 251
  6. 167
  7. 177
  8. 173
  9. 172
  10. 181
  11. 138
  12. 160
  13. 188
  14. 230
  15. 176
  16. 273
  17. 240
  18. 195
  19. 213
  20. 127
  21. 164
  22. 195
  23. 104
  24. 88
  25. 225
  26. 159
  27. 252
  28. 262
  29. 174
  30. 167
  31. 143
  32. 240
  33. 195
  34. 236
  35. 121
  36. 233
  37. 172
  38. 144
  39. 188
  40. 229

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