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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 157 · 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. 1.21 + 58 + 16 + 52 =
  2. 2.19 + 79 + 52 + 79 =
  3. 3.65 + 46 + 75 + 33 =
  4. 4.53 + 85 + 85 + 23 =
  5. 5.87 + 40 + 27 + 77 =
  6. 6.20 + 29 + 20 + 32 =
  7. 7.36 + 61 + 65 + 15 =
  8. 8.11 + 89 + 23 + 33 =
  9. 9.48 + 25 + 58 + 86 =
  10. 10.85 + 82 + 19 + 26 =
  11. 11.53 + 39 + 84 + 25 =
  12. 12.82 + 14 + 36 + 87 =
  13. 13.56 + 61 + 27 + 60 =
  14. 14.19 + 42 + 53 + 42 =
  15. 15.83 + 22 + 54 + 24 =
  16. 16.21 + 20 + 23 + 33 =
  17. 17.16 + 47 + 72 + 19 =
  18. 18.19 + 27 + 69 + 63 =
  19. 19.26 + 41 + 72 + 27 =
  20. 20.13 + 74 + 80 + 69 =
  21. 21.43 + 72 + 85 + 32 =
  22. 22.26 + 41 + 73 + 74 =
  23. 23.19 + 69 + 18 + 67 =
  24. 24.61 + 57 + 48 + 16 =
  25. 25.69 + 79 + 83 + 30 =
  26. 26.17 + 31 + 86 + 44 =
  27. 27.83 + 21 + 63 + 34 =
  28. 28.74 + 22 + 61 + 52 =
  29. 29.17 + 88 + 24 + 88 =
  30. 30.58 + 30 + 49 + 50 =
  31. 31.65 + 34 + 14 + 71 =
  32. 32.61 + 71 + 89 + 49 =
  33. 33.82 + 47 + 36 + 89 =
  34. 34.29 + 86 + 78 + 17 =
  35. 35.73 + 78 + 15 + 29 =
  36. 36.80 + 63 + 55 + 28 =
  37. 37.55 + 56 + 87 + 82 =
  38. 38.84 + 20 + 47 + 76 =
  39. 39.72 + 65 + 11 + 65 =
  40. 40.84 + 64 + 72 + 85 =

Answer key

  1. 147
  2. 229
  3. 219
  4. 246
  5. 231
  6. 101
  7. 177
  8. 156
  9. 217
  10. 212
  11. 201
  12. 219
  13. 204
  14. 156
  15. 183
  16. 97
  17. 154
  18. 178
  19. 166
  20. 236
  21. 232
  22. 214
  23. 173
  24. 182
  25. 261
  26. 178
  27. 201
  28. 209
  29. 217
  30. 187
  31. 184
  32. 270
  33. 254
  34. 210
  35. 195
  36. 226
  37. 280
  38. 227
  39. 213
  40. 305

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