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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 357 · 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. 1.18 + 64 + 18 + 39 =
  2. 2.45 + 53 + 23 + 81 =
  3. 3.35 + 15 + 33 + 81 =
  4. 4.67 + 66 + 78 + 56 =
  5. 5.47 + 61 + 14 + 46 =
  6. 6.75 + 57 + 43 + 74 =
  7. 7.60 + 56 + 85 + 12 =
  8. 8.17 + 42 + 77 + 45 =
  9. 9.86 + 16 + 46 + 61 =
  10. 10.15 + 56 + 16 + 21 =
  11. 11.34 + 86 + 26 + 18 =
  12. 12.50 + 84 + 38 + 32 =
  13. 13.20 + 46 + 70 + 47 =
  14. 14.17 + 21 + 25 + 30 =
  15. 15.30 + 77 + 28 + 17 =
  16. 16.58 + 18 + 79 + 38 =
  17. 17.54 + 61 + 87 + 81 =
  18. 18.47 + 60 + 73 + 61 =
  19. 19.28 + 80 + 77 + 39 =
  20. 20.75 + 64 + 47 + 15 =
  21. 21.22 + 23 + 86 + 43 =
  22. 22.68 + 16 + 54 + 42 =
  23. 23.78 + 86 + 57 + 80 =
  24. 24.58 + 51 + 77 + 47 =
  25. 25.78 + 64 + 49 + 51 =
  26. 26.88 + 24 + 67 + 73 =
  27. 27.82 + 84 + 33 + 11 =
  28. 28.83 + 78 + 49 + 56 =
  29. 29.70 + 41 + 70 + 71 =
  30. 30.56 + 62 + 53 + 28 =
  31. 31.35 + 50 + 70 + 18 =
  32. 32.76 + 16 + 46 + 76 =
  33. 33.22 + 31 + 37 + 88 =
  34. 34.58 + 56 + 31 + 60 =
  35. 35.33 + 88 + 80 + 55 =
  36. 36.52 + 65 + 78 + 15 =
  37. 37.43 + 30 + 22 + 85 =
  38. 38.20 + 74 + 26 + 18 =
  39. 39.85 + 69 + 29 + 61 =
  40. 40.30 + 68 + 40 + 41 =

Answer key

  1. 139
  2. 202
  3. 164
  4. 267
  5. 168
  6. 249
  7. 213
  8. 181
  9. 209
  10. 108
  11. 164
  12. 204
  13. 183
  14. 93
  15. 152
  16. 193
  17. 283
  18. 241
  19. 224
  20. 201
  21. 174
  22. 180
  23. 301
  24. 233
  25. 242
  26. 252
  27. 210
  28. 266
  29. 252
  30. 199
  31. 173
  32. 214
  33. 178
  34. 205
  35. 256
  36. 210
  37. 180
  38. 138
  39. 244
  40. 179

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