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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 833 · 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. 1.89 + 28 + 65 + 33 =
  2. 2.55 + 79 + 56 + 34 =
  3. 3.37 + 32 + 64 + 86 =
  4. 4.64 + 48 + 59 + 18 =
  5. 5.43 + 19 + 61 + 32 =
  6. 6.57 + 12 + 63 + 28 =
  7. 7.24 + 29 + 59 + 16 =
  8. 8.56 + 34 + 31 + 45 =
  9. 9.82 + 24 + 77 + 65 =
  10. 10.54 + 50 + 38 + 71 =
  11. 11.58 + 27 + 57 + 42 =
  12. 12.25 + 27 + 69 + 66 =
  13. 13.21 + 81 + 26 + 28 =
  14. 14.12 + 48 + 88 + 80 =
  15. 15.82 + 63 + 29 + 87 =
  16. 16.14 + 76 + 26 + 74 =
  17. 17.34 + 31 + 88 + 52 =
  18. 18.78 + 19 + 59 + 83 =
  19. 19.32 + 87 + 59 + 73 =
  20. 20.18 + 23 + 41 + 21 =
  21. 21.73 + 58 + 51 + 43 =
  22. 22.57 + 58 + 15 + 24 =
  23. 23.45 + 73 + 67 + 14 =
  24. 24.17 + 88 + 37 + 84 =
  25. 25.27 + 57 + 11 + 30 =
  26. 26.89 + 22 + 18 + 70 =
  27. 27.78 + 81 + 46 + 82 =
  28. 28.78 + 39 + 20 + 46 =
  29. 29.14 + 83 + 15 + 70 =
  30. 30.45 + 37 + 21 + 76 =
  31. 31.30 + 65 + 84 + 62 =
  32. 32.63 + 57 + 77 + 55 =
  33. 33.34 + 54 + 43 + 23 =
  34. 34.17 + 66 + 58 + 37 =
  35. 35.19 + 40 + 44 + 84 =
  36. 36.39 + 73 + 19 + 76 =
  37. 37.33 + 26 + 40 + 47 =
  38. 38.64 + 23 + 28 + 57 =
  39. 39.53 + 17 + 48 + 76 =
  40. 40.79 + 71 + 47 + 70 =

Answer key

  1. 215
  2. 224
  3. 219
  4. 189
  5. 155
  6. 160
  7. 128
  8. 166
  9. 248
  10. 213
  11. 184
  12. 187
  13. 156
  14. 228
  15. 261
  16. 190
  17. 205
  18. 239
  19. 251
  20. 103
  21. 225
  22. 154
  23. 199
  24. 226
  25. 125
  26. 199
  27. 287
  28. 183
  29. 182
  30. 179
  31. 241
  32. 252
  33. 154
  34. 178
  35. 187
  36. 207
  37. 146
  38. 172
  39. 194
  40. 267

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