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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 3 · 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. 1.81 + 49 + 57 + 46 =
  2. 2.33 + 85 + 25 + 65 =
  3. 3.89 + 76 + 80 + 88 =
  4. 4.12 + 47 + 43 + 14 =
  5. 5.28 + 73 + 29 + 51 =
  6. 6.64 + 32 + 56 + 42 =
  7. 7.82 + 59 + 54 + 12 =
  8. 8.88 + 41 + 51 + 81 =
  9. 9.86 + 13 + 49 + 22 =
  10. 10.50 + 36 + 25 + 75 =
  11. 11.80 + 41 + 75 + 51 =
  12. 12.15 + 23 + 24 + 12 =
  13. 13.14 + 41 + 86 + 86 =
  14. 14.68 + 19 + 63 + 11 =
  15. 15.25 + 85 + 36 + 54 =
  16. 16.21 + 69 + 84 + 62 =
  17. 17.65 + 75 + 45 + 25 =
  18. 18.62 + 82 + 20 + 57 =
  19. 19.50 + 58 + 18 + 12 =
  20. 20.23 + 51 + 62 + 20 =
  21. 21.16 + 55 + 18 + 78 =
  22. 22.16 + 41 + 27 + 11 =
  23. 23.43 + 27 + 82 + 78 =
  24. 24.86 + 76 + 24 + 62 =
  25. 25.48 + 86 + 25 + 30 =
  26. 26.43 + 71 + 36 + 12 =
  27. 27.17 + 71 + 28 + 57 =
  28. 28.35 + 19 + 15 + 28 =
  29. 29.11 + 50 + 28 + 12 =
  30. 30.13 + 73 + 17 + 85 =
  31. 31.77 + 85 + 41 + 37 =
  32. 32.56 + 83 + 24 + 36 =
  33. 33.71 + 35 + 60 + 52 =
  34. 34.12 + 61 + 84 + 52 =
  35. 35.34 + 77 + 14 + 60 =
  36. 36.41 + 49 + 31 + 24 =
  37. 37.39 + 50 + 19 + 25 =
  38. 38.71 + 77 + 67 + 27 =
  39. 39.37 + 87 + 82 + 76 =
  40. 40.46 + 61 + 46 + 35 =

Answer key

  1. 233
  2. 208
  3. 333
  4. 116
  5. 181
  6. 194
  7. 207
  8. 261
  9. 170
  10. 186
  11. 247
  12. 74
  13. 227
  14. 161
  15. 200
  16. 236
  17. 210
  18. 221
  19. 138
  20. 156
  21. 167
  22. 95
  23. 230
  24. 248
  25. 189
  26. 162
  27. 173
  28. 97
  29. 101
  30. 188
  31. 240
  32. 199
  33. 218
  34. 209
  35. 185
  36. 145
  37. 133
  38. 242
  39. 282
  40. 188

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