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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 480 · 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. 1.26 + 58 + 11 + 82 =
  2. 2.11 + 70 + 20 + 24 =
  3. 3.42 + 19 + 43 + 14 =
  4. 4.11 + 49 + 35 + 44 =
  5. 5.76 + 66 + 19 + 33 =
  6. 6.25 + 19 + 62 + 20 =
  7. 7.83 + 24 + 55 + 66 =
  8. 8.19 + 25 + 69 + 40 =
  9. 9.49 + 44 + 67 + 55 =
  10. 10.49 + 72 + 72 + 65 =
  11. 11.42 + 88 + 17 + 46 =
  12. 12.32 + 14 + 53 + 21 =
  13. 13.79 + 49 + 80 + 20 =
  14. 14.32 + 33 + 36 + 59 =
  15. 15.86 + 38 + 36 + 55 =
  16. 16.15 + 41 + 71 + 70 =
  17. 17.21 + 22 + 77 + 14 =
  18. 18.24 + 76 + 78 + 89 =
  19. 19.29 + 56 + 63 + 77 =
  20. 20.67 + 57 + 47 + 52 =
  21. 21.49 + 68 + 86 + 85 =
  22. 22.61 + 70 + 73 + 41 =
  23. 23.55 + 40 + 38 + 15 =
  24. 24.85 + 58 + 66 + 18 =
  25. 25.84 + 60 + 23 + 32 =
  26. 26.22 + 84 + 86 + 81 =
  27. 27.30 + 19 + 50 + 20 =
  28. 28.78 + 54 + 56 + 24 =
  29. 29.81 + 39 + 89 + 13 =
  30. 30.73 + 38 + 69 + 39 =
  31. 31.29 + 43 + 52 + 49 =
  32. 32.54 + 43 + 79 + 22 =
  33. 33.76 + 34 + 75 + 57 =
  34. 34.77 + 44 + 69 + 74 =
  35. 35.78 + 38 + 14 + 20 =
  36. 36.26 + 49 + 27 + 12 =
  37. 37.59 + 52 + 28 + 86 =
  38. 38.86 + 50 + 36 + 57 =
  39. 39.57 + 65 + 11 + 15 =
  40. 40.52 + 26 + 63 + 81 =

Answer key

  1. 177
  2. 125
  3. 118
  4. 139
  5. 194
  6. 126
  7. 228
  8. 153
  9. 215
  10. 258
  11. 193
  12. 120
  13. 228
  14. 160
  15. 215
  16. 197
  17. 134
  18. 267
  19. 225
  20. 223
  21. 288
  22. 245
  23. 148
  24. 227
  25. 199
  26. 273
  27. 119
  28. 212
  29. 222
  30. 219
  31. 173
  32. 198
  33. 242
  34. 264
  35. 150
  36. 114
  37. 225
  38. 229
  39. 148
  40. 222

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