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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 518 · 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. 1.20 + 34 + 33 + 48 =
  2. 2.74 + 35 + 14 + 27 =
  3. 3.75 + 74 + 50 + 89 =
  4. 4.83 + 37 + 33 + 72 =
  5. 5.55 + 14 + 41 + 34 =
  6. 6.67 + 85 + 15 + 86 =
  7. 7.32 + 85 + 14 + 43 =
  8. 8.20 + 42 + 25 + 75 =
  9. 9.76 + 41 + 55 + 12 =
  10. 10.62 + 33 + 27 + 52 =
  11. 11.18 + 19 + 47 + 16 =
  12. 12.18 + 24 + 41 + 22 =
  13. 13.49 + 27 + 28 + 45 =
  14. 14.35 + 41 + 65 + 26 =
  15. 15.48 + 21 + 71 + 59 =
  16. 16.58 + 22 + 58 + 14 =
  17. 17.61 + 38 + 83 + 45 =
  18. 18.27 + 50 + 31 + 32 =
  19. 19.84 + 77 + 33 + 15 =
  20. 20.36 + 28 + 85 + 66 =
  21. 21.16 + 31 + 21 + 47 =
  22. 22.32 + 79 + 86 + 59 =
  23. 23.47 + 82 + 62 + 27 =
  24. 24.59 + 44 + 65 + 70 =
  25. 25.68 + 19 + 25 + 38 =
  26. 26.56 + 43 + 60 + 25 =
  27. 27.26 + 33 + 65 + 48 =
  28. 28.69 + 82 + 76 + 50 =
  29. 29.42 + 18 + 24 + 71 =
  30. 30.52 + 41 + 59 + 54 =
  31. 31.62 + 54 + 83 + 17 =
  32. 32.28 + 23 + 27 + 64 =
  33. 33.74 + 13 + 21 + 88 =
  34. 34.62 + 72 + 57 + 40 =
  35. 35.63 + 43 + 49 + 27 =
  36. 36.71 + 70 + 49 + 83 =
  37. 37.47 + 53 + 65 + 25 =
  38. 38.68 + 71 + 24 + 67 =
  39. 39.71 + 60 + 39 + 58 =
  40. 40.84 + 77 + 72 + 54 =

Answer key

  1. 135
  2. 150
  3. 288
  4. 225
  5. 144
  6. 253
  7. 174
  8. 162
  9. 184
  10. 174
  11. 100
  12. 105
  13. 149
  14. 167
  15. 199
  16. 152
  17. 227
  18. 140
  19. 209
  20. 215
  21. 115
  22. 256
  23. 218
  24. 238
  25. 150
  26. 184
  27. 172
  28. 277
  29. 155
  30. 206
  31. 216
  32. 142
  33. 196
  34. 231
  35. 182
  36. 273
  37. 190
  38. 230
  39. 228
  40. 287

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