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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 735 · 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. 1.77 + 24 + 55 + 72 =
  2. 2.87 + 11 + 51 + 66 =
  3. 3.33 + 68 + 18 + 19 =
  4. 4.67 + 54 + 69 + 40 =
  5. 5.81 + 27 + 78 + 76 =
  6. 6.55 + 61 + 57 + 86 =
  7. 7.73 + 78 + 68 + 56 =
  8. 8.81 + 11 + 34 + 25 =
  9. 9.31 + 45 + 38 + 85 =
  10. 10.86 + 50 + 78 + 12 =
  11. 11.86 + 49 + 52 + 81 =
  12. 12.78 + 76 + 66 + 37 =
  13. 13.23 + 48 + 62 + 81 =
  14. 14.17 + 84 + 15 + 50 =
  15. 15.59 + 70 + 39 + 83 =
  16. 16.89 + 86 + 30 + 38 =
  17. 17.11 + 36 + 17 + 84 =
  18. 18.71 + 52 + 72 + 40 =
  19. 19.30 + 84 + 21 + 27 =
  20. 20.25 + 17 + 41 + 66 =
  21. 21.27 + 32 + 30 + 73 =
  22. 22.45 + 58 + 33 + 37 =
  23. 23.59 + 51 + 68 + 47 =
  24. 24.66 + 56 + 51 + 39 =
  25. 25.51 + 28 + 49 + 87 =
  26. 26.33 + 37 + 83 + 36 =
  27. 27.11 + 15 + 24 + 25 =
  28. 28.80 + 70 + 81 + 36 =
  29. 29.24 + 19 + 66 + 17 =
  30. 30.69 + 19 + 88 + 40 =
  31. 31.12 + 41 + 65 + 77 =
  32. 32.52 + 38 + 61 + 14 =
  33. 33.13 + 17 + 16 + 52 =
  34. 34.54 + 37 + 48 + 28 =
  35. 35.37 + 51 + 64 + 37 =
  36. 36.47 + 27 + 22 + 33 =
  37. 37.62 + 50 + 88 + 80 =
  38. 38.31 + 80 + 76 + 40 =
  39. 39.28 + 84 + 80 + 73 =
  40. 40.85 + 82 + 36 + 27 =

Answer key

  1. 228
  2. 215
  3. 138
  4. 230
  5. 262
  6. 259
  7. 275
  8. 151
  9. 199
  10. 226
  11. 268
  12. 257
  13. 214
  14. 166
  15. 251
  16. 243
  17. 148
  18. 235
  19. 162
  20. 149
  21. 162
  22. 173
  23. 225
  24. 212
  25. 215
  26. 189
  27. 75
  28. 267
  29. 126
  30. 216
  31. 195
  32. 165
  33. 98
  34. 167
  35. 189
  36. 129
  37. 280
  38. 227
  39. 265
  40. 230

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