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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 8 · 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. 1.28 + 48 + 63 + 19 =
  2. 2.76 + 34 + 29 + 36 =
  3. 3.71 + 88 + 17 + 78 =
  4. 4.78 + 20 + 58 + 80 =
  5. 5.88 + 32 + 33 + 64 =
  6. 6.44 + 49 + 72 + 55 =
  7. 7.63 + 22 + 20 + 85 =
  8. 8.76 + 44 + 76 + 15 =
  9. 9.82 + 29 + 22 + 64 =
  10. 10.61 + 17 + 73 + 63 =
  11. 11.84 + 18 + 79 + 24 =
  12. 12.33 + 26 + 71 + 49 =
  13. 13.16 + 75 + 50 + 41 =
  14. 14.87 + 50 + 17 + 60 =
  15. 15.88 + 25 + 27 + 42 =
  16. 16.50 + 20 + 20 + 55 =
  17. 17.35 + 16 + 53 + 27 =
  18. 18.52 + 43 + 15 + 89 =
  19. 19.25 + 78 + 50 + 70 =
  20. 20.46 + 42 + 66 + 86 =
  21. 21.70 + 44 + 68 + 84 =
  22. 22.61 + 61 + 70 + 29 =
  23. 23.59 + 48 + 73 + 45 =
  24. 24.55 + 16 + 68 + 47 =
  25. 25.72 + 15 + 57 + 56 =
  26. 26.23 + 63 + 62 + 82 =
  27. 27.41 + 27 + 11 + 86 =
  28. 28.54 + 17 + 39 + 39 =
  29. 29.24 + 84 + 53 + 41 =
  30. 30.50 + 26 + 13 + 25 =
  31. 31.66 + 50 + 11 + 16 =
  32. 32.24 + 54 + 29 + 87 =
  33. 33.19 + 86 + 78 + 61 =
  34. 34.72 + 16 + 87 + 28 =
  35. 35.38 + 37 + 55 + 28 =
  36. 36.14 + 45 + 48 + 30 =
  37. 37.30 + 35 + 51 + 68 =
  38. 38.58 + 59 + 23 + 26 =
  39. 39.32 + 12 + 44 + 67 =
  40. 40.80 + 88 + 11 + 64 =

Answer key

  1. 158
  2. 175
  3. 254
  4. 236
  5. 217
  6. 220
  7. 190
  8. 211
  9. 197
  10. 214
  11. 205
  12. 179
  13. 182
  14. 214
  15. 182
  16. 145
  17. 131
  18. 199
  19. 223
  20. 240
  21. 266
  22. 221
  23. 225
  24. 186
  25. 200
  26. 230
  27. 165
  28. 149
  29. 202
  30. 114
  31. 143
  32. 194
  33. 244
  34. 203
  35. 158
  36. 137
  37. 184
  38. 166
  39. 155
  40. 243

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