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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 343 · 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 + 82 + 48 + 32 =
  2. 2.27 + 59 + 40 + 59 =
  3. 3.65 + 86 + 63 + 33 =
  4. 4.23 + 43 + 69 + 33 =
  5. 5.53 + 69 + 17 + 16 =
  6. 6.57 + 32 + 16 + 48 =
  7. 7.19 + 49 + 41 + 75 =
  8. 8.12 + 78 + 29 + 30 =
  9. 9.37 + 34 + 40 + 60 =
  10. 10.75 + 23 + 28 + 67 =
  11. 11.82 + 11 + 60 + 28 =
  12. 12.81 + 37 + 81 + 35 =
  13. 13.18 + 23 + 18 + 41 =
  14. 14.32 + 86 + 27 + 39 =
  15. 15.68 + 20 + 49 + 44 =
  16. 16.75 + 21 + 61 + 29 =
  17. 17.42 + 24 + 29 + 69 =
  18. 18.79 + 44 + 55 + 24 =
  19. 19.17 + 31 + 21 + 52 =
  20. 20.57 + 32 + 53 + 33 =
  21. 21.80 + 53 + 84 + 31 =
  22. 22.88 + 75 + 13 + 19 =
  23. 23.70 + 50 + 70 + 57 =
  24. 24.71 + 62 + 89 + 37 =
  25. 25.26 + 70 + 28 + 45 =
  26. 26.78 + 37 + 31 + 64 =
  27. 27.65 + 66 + 17 + 58 =
  28. 28.81 + 76 + 71 + 49 =
  29. 29.75 + 67 + 14 + 59 =
  30. 30.89 + 25 + 66 + 44 =
  31. 31.64 + 25 + 82 + 11 =
  32. 32.74 + 80 + 18 + 87 =
  33. 33.60 + 50 + 36 + 86 =
  34. 34.32 + 29 + 12 + 36 =
  35. 35.11 + 16 + 89 + 60 =
  36. 36.48 + 66 + 45 + 45 =
  37. 37.54 + 18 + 12 + 11 =
  38. 38.47 + 43 + 37 + 59 =
  39. 39.32 + 12 + 36 + 30 =
  40. 40.75 + 62 + 30 + 47 =

Answer key

  1. 239
  2. 185
  3. 247
  4. 168
  5. 155
  6. 153
  7. 184
  8. 149
  9. 171
  10. 193
  11. 181
  12. 234
  13. 100
  14. 184
  15. 181
  16. 186
  17. 164
  18. 202
  19. 121
  20. 175
  21. 248
  22. 195
  23. 247
  24. 259
  25. 169
  26. 210
  27. 206
  28. 277
  29. 215
  30. 224
  31. 182
  32. 259
  33. 232
  34. 109
  35. 176
  36. 204
  37. 95
  38. 186
  39. 110
  40. 214

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