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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 226 · 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 + 53 + 89 + 40 =
  2. 2.40 + 83 + 80 + 84 =
  3. 3.87 + 78 + 59 + 46 =
  4. 4.43 + 52 + 42 + 71 =
  5. 5.15 + 40 + 21 + 63 =
  6. 6.16 + 79 + 55 + 56 =
  7. 7.33 + 54 + 15 + 34 =
  8. 8.61 + 74 + 25 + 45 =
  9. 9.25 + 34 + 79 + 80 =
  10. 10.14 + 70 + 63 + 16 =
  11. 11.72 + 24 + 51 + 71 =
  12. 12.16 + 40 + 18 + 31 =
  13. 13.32 + 38 + 17 + 28 =
  14. 14.11 + 58 + 77 + 56 =
  15. 15.30 + 26 + 15 + 18 =
  16. 16.15 + 86 + 39 + 74 =
  17. 17.35 + 45 + 85 + 63 =
  18. 18.34 + 64 + 56 + 30 =
  19. 19.36 + 43 + 72 + 63 =
  20. 20.13 + 57 + 38 + 64 =
  21. 21.11 + 37 + 13 + 15 =
  22. 22.80 + 52 + 16 + 67 =
  23. 23.15 + 15 + 58 + 40 =
  24. 24.56 + 37 + 57 + 11 =
  25. 25.79 + 27 + 35 + 49 =
  26. 26.30 + 56 + 20 + 69 =
  27. 27.28 + 46 + 47 + 84 =
  28. 28.47 + 81 + 53 + 66 =
  29. 29.70 + 18 + 24 + 78 =
  30. 30.16 + 55 + 26 + 12 =
  31. 31.29 + 70 + 48 + 53 =
  32. 32.69 + 61 + 16 + 19 =
  33. 33.60 + 19 + 68 + 75 =
  34. 34.53 + 68 + 74 + 77 =
  35. 35.81 + 51 + 83 + 30 =
  36. 36.12 + 71 + 66 + 74 =
  37. 37.36 + 83 + 62 + 86 =
  38. 38.71 + 64 + 75 + 19 =
  39. 39.73 + 69 + 32 + 11 =
  40. 40.72 + 18 + 36 + 73 =

Answer key

  1. 202
  2. 287
  3. 270
  4. 208
  5. 139
  6. 206
  7. 136
  8. 205
  9. 218
  10. 163
  11. 218
  12. 105
  13. 115
  14. 202
  15. 89
  16. 214
  17. 228
  18. 184
  19. 214
  20. 172
  21. 76
  22. 215
  23. 128
  24. 161
  25. 190
  26. 175
  27. 205
  28. 247
  29. 190
  30. 109
  31. 200
  32. 165
  33. 222
  34. 272
  35. 245
  36. 223
  37. 267
  38. 229
  39. 185
  40. 199

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