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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 16 · 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. 1.29 + 21 + 20 + 41 =
  2. 2.38 + 33 + 76 + 59 =
  3. 3.83 + 43 + 76 + 46 =
  4. 4.85 + 89 + 46 + 83 =
  5. 5.27 + 28 + 68 + 50 =
  6. 6.24 + 88 + 39 + 80 =
  7. 7.34 + 49 + 12 + 75 =
  8. 8.87 + 25 + 40 + 33 =
  9. 9.57 + 59 + 59 + 28 =
  10. 10.85 + 11 + 72 + 63 =
  11. 11.73 + 32 + 68 + 13 =
  12. 12.83 + 81 + 22 + 30 =
  13. 13.89 + 77 + 57 + 31 =
  14. 14.32 + 55 + 46 + 81 =
  15. 15.47 + 49 + 72 + 17 =
  16. 16.12 + 84 + 38 + 89 =
  17. 17.53 + 15 + 83 + 24 =
  18. 18.18 + 70 + 32 + 16 =
  19. 19.34 + 38 + 19 + 39 =
  20. 20.71 + 54 + 76 + 73 =
  21. 21.15 + 40 + 71 + 41 =
  22. 22.22 + 86 + 23 + 32 =
  23. 23.27 + 38 + 48 + 89 =
  24. 24.65 + 59 + 79 + 38 =
  25. 25.44 + 29 + 26 + 19 =
  26. 26.87 + 19 + 50 + 80 =
  27. 27.69 + 27 + 83 + 83 =
  28. 28.20 + 38 + 21 + 64 =
  29. 29.11 + 15 + 11 + 14 =
  30. 30.79 + 42 + 50 + 59 =
  31. 31.35 + 45 + 43 + 53 =
  32. 32.31 + 16 + 15 + 89 =
  33. 33.83 + 55 + 73 + 20 =
  34. 34.78 + 24 + 22 + 30 =
  35. 35.45 + 61 + 33 + 21 =
  36. 36.28 + 46 + 18 + 85 =
  37. 37.25 + 19 + 49 + 52 =
  38. 38.44 + 49 + 70 + 52 =
  39. 39.89 + 62 + 29 + 27 =
  40. 40.84 + 29 + 74 + 43 =

Answer key

  1. 111
  2. 206
  3. 248
  4. 303
  5. 173
  6. 231
  7. 170
  8. 185
  9. 203
  10. 231
  11. 186
  12. 216
  13. 254
  14. 214
  15. 185
  16. 223
  17. 175
  18. 136
  19. 130
  20. 274
  21. 167
  22. 163
  23. 202
  24. 241
  25. 118
  26. 236
  27. 262
  28. 143
  29. 51
  30. 230
  31. 176
  32. 151
  33. 231
  34. 154
  35. 160
  36. 177
  37. 145
  38. 215
  39. 207
  40. 230

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