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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 626 · 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. 1.65 + 66 + 24 + 22 =
  2. 2.35 + 41 + 18 + 24 =
  3. 3.80 + 41 + 54 + 83 =
  4. 4.66 + 83 + 72 + 65 =
  5. 5.29 + 89 + 28 + 37 =
  6. 6.19 + 46 + 17 + 47 =
  7. 7.40 + 34 + 77 + 85 =
  8. 8.20 + 76 + 71 + 25 =
  9. 9.84 + 62 + 11 + 48 =
  10. 10.78 + 31 + 27 + 19 =
  11. 11.65 + 70 + 44 + 18 =
  12. 12.42 + 89 + 31 + 47 =
  13. 13.70 + 68 + 52 + 25 =
  14. 14.32 + 11 + 28 + 24 =
  15. 15.39 + 86 + 52 + 20 =
  16. 16.37 + 51 + 58 + 80 =
  17. 17.76 + 72 + 26 + 61 =
  18. 18.50 + 43 + 41 + 14 =
  19. 19.82 + 77 + 86 + 79 =
  20. 20.14 + 30 + 49 + 81 =
  21. 21.54 + 54 + 12 + 16 =
  22. 22.88 + 41 + 32 + 23 =
  23. 23.35 + 75 + 35 + 41 =
  24. 24.72 + 23 + 36 + 27 =
  25. 25.18 + 14 + 20 + 23 =
  26. 26.30 + 86 + 24 + 67 =
  27. 27.15 + 81 + 69 + 15 =
  28. 28.22 + 30 + 56 + 43 =
  29. 29.59 + 17 + 45 + 16 =
  30. 30.55 + 74 + 52 + 79 =
  31. 31.79 + 14 + 46 + 26 =
  32. 32.16 + 21 + 47 + 65 =
  33. 33.13 + 17 + 39 + 51 =
  34. 34.47 + 64 + 31 + 41 =
  35. 35.22 + 20 + 19 + 11 =
  36. 36.24 + 63 + 29 + 51 =
  37. 37.13 + 26 + 46 + 49 =
  38. 38.65 + 28 + 24 + 60 =
  39. 39.51 + 11 + 50 + 31 =
  40. 40.80 + 70 + 49 + 13 =

Answer key

  1. 177
  2. 118
  3. 258
  4. 286
  5. 183
  6. 129
  7. 236
  8. 192
  9. 205
  10. 155
  11. 197
  12. 209
  13. 215
  14. 95
  15. 197
  16. 226
  17. 235
  18. 148
  19. 324
  20. 174
  21. 136
  22. 184
  23. 186
  24. 158
  25. 75
  26. 207
  27. 180
  28. 151
  29. 137
  30. 260
  31. 165
  32. 149
  33. 120
  34. 183
  35. 72
  36. 167
  37. 134
  38. 177
  39. 143
  40. 212

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