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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 656 · 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. 1.82 + 86 + 23 + 58 =
  2. 2.24 + 67 + 15 + 50 =
  3. 3.25 + 24 + 65 + 81 =
  4. 4.76 + 50 + 32 + 69 =
  5. 5.65 + 44 + 37 + 58 =
  6. 6.25 + 19 + 49 + 31 =
  7. 7.55 + 28 + 11 + 45 =
  8. 8.83 + 30 + 12 + 11 =
  9. 9.72 + 86 + 23 + 35 =
  10. 10.59 + 31 + 25 + 16 =
  11. 11.19 + 79 + 13 + 55 =
  12. 12.38 + 40 + 61 + 18 =
  13. 13.58 + 88 + 66 + 18 =
  14. 14.22 + 27 + 22 + 34 =
  15. 15.14 + 42 + 13 + 87 =
  16. 16.13 + 16 + 68 + 36 =
  17. 17.43 + 17 + 64 + 29 =
  18. 18.70 + 55 + 75 + 60 =
  19. 19.24 + 13 + 14 + 59 =
  20. 20.77 + 15 + 44 + 35 =
  21. 21.30 + 20 + 53 + 14 =
  22. 22.18 + 55 + 13 + 40 =
  23. 23.54 + 32 + 83 + 84 =
  24. 24.19 + 50 + 79 + 56 =
  25. 25.53 + 56 + 30 + 51 =
  26. 26.72 + 75 + 78 + 57 =
  27. 27.65 + 45 + 37 + 39 =
  28. 28.19 + 84 + 67 + 14 =
  29. 29.22 + 72 + 65 + 42 =
  30. 30.59 + 13 + 48 + 23 =
  31. 31.62 + 82 + 15 + 42 =
  32. 32.32 + 57 + 68 + 67 =
  33. 33.49 + 34 + 64 + 56 =
  34. 34.49 + 74 + 30 + 32 =
  35. 35.84 + 55 + 68 + 32 =
  36. 36.14 + 16 + 15 + 31 =
  37. 37.44 + 48 + 53 + 85 =
  38. 38.41 + 47 + 21 + 67 =
  39. 39.34 + 27 + 77 + 35 =
  40. 40.42 + 58 + 20 + 31 =

Answer key

  1. 249
  2. 156
  3. 195
  4. 227
  5. 204
  6. 124
  7. 139
  8. 136
  9. 216
  10. 131
  11. 166
  12. 157
  13. 230
  14. 105
  15. 156
  16. 133
  17. 153
  18. 260
  19. 110
  20. 171
  21. 117
  22. 126
  23. 253
  24. 204
  25. 190
  26. 282
  27. 186
  28. 184
  29. 201
  30. 143
  31. 201
  32. 224
  33. 203
  34. 185
  35. 239
  36. 76
  37. 230
  38. 176
  39. 173
  40. 151

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