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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 51 · 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. 1.57 + 59 + 49 + 60 =
  2. 2.62 + 11 + 34 + 52 =
  3. 3.79 + 84 + 17 + 13 =
  4. 4.74 + 40 + 31 + 20 =
  5. 5.18 + 22 + 26 + 78 =
  6. 6.76 + 17 + 58 + 87 =
  7. 7.14 + 40 + 62 + 45 =
  8. 8.72 + 85 + 30 + 47 =
  9. 9.15 + 65 + 37 + 15 =
  10. 10.19 + 41 + 49 + 28 =
  11. 11.71 + 56 + 48 + 18 =
  12. 12.74 + 38 + 57 + 13 =
  13. 13.70 + 61 + 56 + 14 =
  14. 14.24 + 58 + 82 + 77 =
  15. 15.70 + 51 + 48 + 25 =
  16. 16.88 + 34 + 14 + 68 =
  17. 17.61 + 19 + 81 + 43 =
  18. 18.47 + 13 + 74 + 26 =
  19. 19.84 + 49 + 44 + 24 =
  20. 20.38 + 38 + 70 + 87 =
  21. 21.19 + 84 + 48 + 73 =
  22. 22.84 + 75 + 39 + 16 =
  23. 23.48 + 21 + 64 + 67 =
  24. 24.20 + 88 + 40 + 69 =
  25. 25.60 + 81 + 69 + 36 =
  26. 26.81 + 81 + 76 + 14 =
  27. 27.21 + 55 + 25 + 62 =
  28. 28.78 + 20 + 39 + 88 =
  29. 29.69 + 72 + 54 + 17 =
  30. 30.71 + 48 + 17 + 14 =
  31. 31.35 + 18 + 54 + 57 =
  32. 32.13 + 65 + 54 + 64 =
  33. 33.73 + 47 + 36 + 80 =
  34. 34.32 + 70 + 11 + 31 =
  35. 35.39 + 79 + 69 + 89 =
  36. 36.15 + 81 + 85 + 49 =
  37. 37.47 + 64 + 34 + 29 =
  38. 38.13 + 23 + 56 + 28 =
  39. 39.22 + 42 + 64 + 53 =
  40. 40.76 + 42 + 25 + 89 =

Answer key

  1. 225
  2. 159
  3. 193
  4. 165
  5. 144
  6. 238
  7. 161
  8. 234
  9. 132
  10. 137
  11. 193
  12. 182
  13. 201
  14. 241
  15. 194
  16. 204
  17. 204
  18. 160
  19. 201
  20. 233
  21. 224
  22. 214
  23. 200
  24. 217
  25. 246
  26. 252
  27. 163
  28. 225
  29. 212
  30. 150
  31. 164
  32. 196
  33. 236
  34. 144
  35. 276
  36. 230
  37. 174
  38. 120
  39. 181
  40. 232

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