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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 256 · 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. 1.83 + 29 + 52 + 15 =
  2. 2.39 + 54 + 20 + 21 =
  3. 3.47 + 80 + 52 + 33 =
  4. 4.72 + 43 + 41 + 21 =
  5. 5.15 + 57 + 63 + 54 =
  6. 6.51 + 73 + 66 + 60 =
  7. 7.84 + 87 + 19 + 39 =
  8. 8.81 + 68 + 40 + 63 =
  9. 9.83 + 88 + 85 + 18 =
  10. 10.21 + 86 + 64 + 33 =
  11. 11.39 + 28 + 48 + 24 =
  12. 12.18 + 78 + 54 + 57 =
  13. 13.89 + 83 + 76 + 64 =
  14. 14.75 + 74 + 54 + 68 =
  15. 15.50 + 70 + 24 + 79 =
  16. 16.26 + 37 + 76 + 18 =
  17. 17.64 + 81 + 62 + 61 =
  18. 18.71 + 43 + 21 + 83 =
  19. 19.51 + 37 + 59 + 39 =
  20. 20.47 + 13 + 57 + 25 =
  21. 21.49 + 89 + 30 + 74 =
  22. 22.65 + 69 + 59 + 21 =
  23. 23.47 + 89 + 23 + 16 =
  24. 24.65 + 68 + 12 + 57 =
  25. 25.80 + 40 + 51 + 44 =
  26. 26.89 + 70 + 20 + 83 =
  27. 27.22 + 66 + 50 + 23 =
  28. 28.45 + 30 + 21 + 31 =
  29. 29.48 + 66 + 35 + 36 =
  30. 30.76 + 11 + 27 + 80 =
  31. 31.62 + 29 + 70 + 46 =
  32. 32.12 + 41 + 17 + 48 =
  33. 33.81 + 36 + 51 + 35 =
  34. 34.12 + 59 + 56 + 11 =
  35. 35.52 + 21 + 67 + 72 =
  36. 36.29 + 56 + 59 + 20 =
  37. 37.20 + 24 + 60 + 69 =
  38. 38.29 + 27 + 67 + 37 =
  39. 39.86 + 64 + 84 + 27 =
  40. 40.29 + 46 + 58 + 47 =

Answer key

  1. 179
  2. 134
  3. 212
  4. 177
  5. 189
  6. 250
  7. 229
  8. 252
  9. 274
  10. 204
  11. 139
  12. 207
  13. 312
  14. 271
  15. 223
  16. 157
  17. 268
  18. 218
  19. 186
  20. 142
  21. 242
  22. 214
  23. 175
  24. 202
  25. 215
  26. 262
  27. 161
  28. 127
  29. 185
  30. 194
  31. 207
  32. 118
  33. 203
  34. 138
  35. 212
  36. 164
  37. 173
  38. 160
  39. 261
  40. 180

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