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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 642 · 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. 1.62 + 19 + 27 + 85 =
  2. 2.20 + 52 + 75 + 50 =
  3. 3.57 + 38 + 67 + 18 =
  4. 4.87 + 16 + 26 + 30 =
  5. 5.68 + 28 + 31 + 22 =
  6. 6.80 + 62 + 13 + 29 =
  7. 7.88 + 52 + 69 + 41 =
  8. 8.74 + 34 + 23 + 56 =
  9. 9.19 + 34 + 67 + 29 =
  10. 10.19 + 32 + 87 + 59 =
  11. 11.41 + 57 + 62 + 61 =
  12. 12.40 + 12 + 87 + 28 =
  13. 13.38 + 57 + 18 + 32 =
  14. 14.78 + 47 + 56 + 32 =
  15. 15.35 + 66 + 32 + 29 =
  16. 16.32 + 86 + 52 + 52 =
  17. 17.20 + 54 + 76 + 48 =
  18. 18.61 + 44 + 16 + 31 =
  19. 19.13 + 75 + 17 + 70 =
  20. 20.64 + 45 + 12 + 81 =
  21. 21.82 + 74 + 84 + 27 =
  22. 22.60 + 22 + 41 + 25 =
  23. 23.43 + 39 + 77 + 80 =
  24. 24.44 + 11 + 39 + 11 =
  25. 25.20 + 81 + 21 + 67 =
  26. 26.30 + 46 + 57 + 35 =
  27. 27.18 + 28 + 70 + 34 =
  28. 28.62 + 23 + 81 + 65 =
  29. 29.25 + 49 + 77 + 44 =
  30. 30.47 + 16 + 87 + 81 =
  31. 31.83 + 39 + 77 + 39 =
  32. 32.79 + 20 + 58 + 51 =
  33. 33.14 + 21 + 52 + 72 =
  34. 34.49 + 86 + 81 + 73 =
  35. 35.20 + 80 + 33 + 27 =
  36. 36.12 + 65 + 32 + 76 =
  37. 37.51 + 37 + 27 + 78 =
  38. 38.41 + 73 + 69 + 44 =
  39. 39.64 + 18 + 18 + 27 =
  40. 40.13 + 88 + 82 + 89 =

Answer key

  1. 193
  2. 197
  3. 180
  4. 159
  5. 149
  6. 184
  7. 250
  8. 187
  9. 149
  10. 197
  11. 221
  12. 167
  13. 145
  14. 213
  15. 162
  16. 222
  17. 198
  18. 152
  19. 175
  20. 202
  21. 267
  22. 148
  23. 239
  24. 105
  25. 189
  26. 168
  27. 150
  28. 231
  29. 195
  30. 231
  31. 238
  32. 208
  33. 159
  34. 289
  35. 160
  36. 185
  37. 193
  38. 227
  39. 127
  40. 272

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