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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 214 · 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. 1.17 + 59 + 74 + 26 =
  2. 2.78 + 13 + 67 + 40 =
  3. 3.74 + 74 + 45 + 83 =
  4. 4.83 + 25 + 16 + 65 =
  5. 5.85 + 82 + 61 + 15 =
  6. 6.87 + 30 + 18 + 66 =
  7. 7.42 + 36 + 55 + 20 =
  8. 8.86 + 49 + 86 + 82 =
  9. 9.29 + 16 + 67 + 38 =
  10. 10.29 + 79 + 16 + 15 =
  11. 11.81 + 67 + 49 + 64 =
  12. 12.14 + 25 + 25 + 32 =
  13. 13.58 + 68 + 77 + 46 =
  14. 14.14 + 50 + 29 + 64 =
  15. 15.88 + 27 + 31 + 58 =
  16. 16.21 + 48 + 53 + 89 =
  17. 17.14 + 31 + 76 + 78 =
  18. 18.17 + 58 + 56 + 77 =
  19. 19.86 + 26 + 51 + 30 =
  20. 20.66 + 53 + 22 + 69 =
  21. 21.62 + 14 + 17 + 68 =
  22. 22.72 + 21 + 87 + 68 =
  23. 23.39 + 31 + 57 + 30 =
  24. 24.12 + 86 + 83 + 26 =
  25. 25.77 + 36 + 22 + 82 =
  26. 26.17 + 52 + 21 + 82 =
  27. 27.81 + 25 + 25 + 56 =
  28. 28.84 + 48 + 31 + 25 =
  29. 29.54 + 52 + 53 + 47 =
  30. 30.12 + 11 + 44 + 55 =
  31. 31.83 + 12 + 77 + 76 =
  32. 32.79 + 63 + 38 + 11 =
  33. 33.74 + 34 + 44 + 86 =
  34. 34.59 + 14 + 78 + 20 =
  35. 35.33 + 80 + 65 + 17 =
  36. 36.29 + 59 + 65 + 87 =
  37. 37.63 + 29 + 58 + 13 =
  38. 38.84 + 13 + 83 + 50 =
  39. 39.30 + 63 + 86 + 41 =
  40. 40.38 + 63 + 63 + 20 =

Answer key

  1. 176
  2. 198
  3. 276
  4. 189
  5. 243
  6. 201
  7. 153
  8. 303
  9. 150
  10. 139
  11. 261
  12. 96
  13. 249
  14. 157
  15. 204
  16. 211
  17. 199
  18. 208
  19. 193
  20. 210
  21. 161
  22. 248
  23. 157
  24. 207
  25. 217
  26. 172
  27. 187
  28. 188
  29. 206
  30. 122
  31. 248
  32. 191
  33. 238
  34. 171
  35. 195
  36. 240
  37. 163
  38. 230
  39. 220
  40. 184

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