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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 38 · 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. 1.87 + 83 + 59 + 38 =
  2. 2.63 + 54 + 11 + 46 =
  3. 3.29 + 47 + 47 + 71 =
  4. 4.39 + 56 + 36 + 63 =
  5. 5.35 + 86 + 39 + 55 =
  6. 6.48 + 30 + 79 + 24 =
  7. 7.46 + 80 + 57 + 21 =
  8. 8.82 + 88 + 34 + 23 =
  9. 9.37 + 86 + 52 + 86 =
  10. 10.61 + 19 + 82 + 64 =
  11. 11.85 + 11 + 44 + 19 =
  12. 12.43 + 48 + 57 + 62 =
  13. 13.66 + 67 + 82 + 16 =
  14. 14.12 + 89 + 59 + 12 =
  15. 15.43 + 32 + 15 + 16 =
  16. 16.13 + 16 + 81 + 11 =
  17. 17.71 + 86 + 54 + 31 =
  18. 18.74 + 69 + 39 + 18 =
  19. 19.82 + 66 + 78 + 15 =
  20. 20.56 + 53 + 23 + 40 =
  21. 21.19 + 43 + 49 + 89 =
  22. 22.66 + 23 + 13 + 16 =
  23. 23.47 + 63 + 18 + 85 =
  24. 24.56 + 66 + 19 + 16 =
  25. 25.78 + 42 + 46 + 77 =
  26. 26.45 + 37 + 62 + 86 =
  27. 27.24 + 42 + 14 + 22 =
  28. 28.27 + 22 + 16 + 82 =
  29. 29.50 + 84 + 60 + 72 =
  30. 30.65 + 20 + 13 + 85 =
  31. 31.26 + 69 + 63 + 62 =
  32. 32.11 + 71 + 56 + 40 =
  33. 33.73 + 26 + 89 + 12 =
  34. 34.19 + 74 + 47 + 64 =
  35. 35.47 + 15 + 16 + 37 =
  36. 36.87 + 48 + 89 + 79 =
  37. 37.70 + 66 + 54 + 22 =
  38. 38.60 + 37 + 24 + 72 =
  39. 39.39 + 12 + 35 + 15 =
  40. 40.58 + 14 + 59 + 58 =

Answer key

  1. 267
  2. 174
  3. 194
  4. 194
  5. 215
  6. 181
  7. 204
  8. 227
  9. 261
  10. 226
  11. 159
  12. 210
  13. 231
  14. 172
  15. 106
  16. 121
  17. 242
  18. 200
  19. 241
  20. 172
  21. 200
  22. 118
  23. 213
  24. 157
  25. 243
  26. 230
  27. 102
  28. 147
  29. 266
  30. 183
  31. 220
  32. 178
  33. 200
  34. 204
  35. 115
  36. 303
  37. 212
  38. 193
  39. 101
  40. 189

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