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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 280 · 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. 1.64 + 74 + 46 + 54 =
  2. 2.31 + 26 + 44 + 56 =
  3. 3.74 + 76 + 42 + 76 =
  4. 4.17 + 68 + 32 + 76 =
  5. 5.21 + 54 + 52 + 77 =
  6. 6.52 + 85 + 51 + 14 =
  7. 7.72 + 54 + 52 + 24 =
  8. 8.21 + 56 + 82 + 26 =
  9. 9.89 + 67 + 83 + 52 =
  10. 10.42 + 34 + 46 + 22 =
  11. 11.78 + 19 + 14 + 23 =
  12. 12.72 + 52 + 81 + 18 =
  13. 13.31 + 37 + 19 + 86 =
  14. 14.68 + 15 + 52 + 88 =
  15. 15.42 + 83 + 30 + 49 =
  16. 16.77 + 21 + 89 + 22 =
  17. 17.53 + 68 + 52 + 14 =
  18. 18.53 + 16 + 27 + 24 =
  19. 19.76 + 40 + 48 + 86 =
  20. 20.30 + 66 + 24 + 22 =
  21. 21.75 + 24 + 47 + 89 =
  22. 22.51 + 36 + 42 + 12 =
  23. 23.62 + 22 + 25 + 30 =
  24. 24.40 + 24 + 22 + 63 =
  25. 25.51 + 37 + 26 + 68 =
  26. 26.18 + 76 + 83 + 42 =
  27. 27.81 + 42 + 20 + 86 =
  28. 28.31 + 72 + 89 + 34 =
  29. 29.27 + 19 + 65 + 42 =
  30. 30.25 + 41 + 61 + 80 =
  31. 31.39 + 64 + 18 + 12 =
  32. 32.71 + 66 + 14 + 27 =
  33. 33.60 + 30 + 74 + 47 =
  34. 34.79 + 42 + 41 + 32 =
  35. 35.22 + 65 + 12 + 28 =
  36. 36.47 + 60 + 40 + 12 =
  37. 37.31 + 21 + 47 + 60 =
  38. 38.22 + 68 + 31 + 75 =
  39. 39.74 + 37 + 27 + 88 =
  40. 40.39 + 13 + 55 + 65 =

Answer key

  1. 238
  2. 157
  3. 268
  4. 193
  5. 204
  6. 202
  7. 202
  8. 185
  9. 291
  10. 144
  11. 134
  12. 223
  13. 173
  14. 223
  15. 204
  16. 209
  17. 187
  18. 120
  19. 250
  20. 142
  21. 235
  22. 141
  23. 139
  24. 149
  25. 182
  26. 219
  27. 229
  28. 226
  29. 153
  30. 207
  31. 133
  32. 178
  33. 211
  34. 194
  35. 127
  36. 159
  37. 159
  38. 196
  39. 226
  40. 172

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