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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 680 · 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. 1.12 + 56 + 81 + 47 =
  2. 2.53 + 39 + 49 + 48 =
  3. 3.26 + 65 + 41 + 22 =
  4. 4.73 + 20 + 53 + 75 =
  5. 5.31 + 35 + 50 + 43 =
  6. 6.61 + 44 + 40 + 86 =
  7. 7.45 + 53 + 14 + 26 =
  8. 8.71 + 17 + 27 + 60 =
  9. 9.24 + 16 + 15 + 80 =
  10. 10.35 + 72 + 43 + 55 =
  11. 11.15 + 22 + 11 + 14 =
  12. 12.48 + 55 + 50 + 64 =
  13. 13.65 + 45 + 17 + 59 =
  14. 14.85 + 16 + 84 + 24 =
  15. 15.61 + 52 + 85 + 89 =
  16. 16.75 + 33 + 38 + 18 =
  17. 17.62 + 46 + 33 + 56 =
  18. 18.42 + 58 + 86 + 73 =
  19. 19.61 + 16 + 42 + 83 =
  20. 20.37 + 56 + 28 + 45 =
  21. 21.73 + 80 + 68 + 21 =
  22. 22.74 + 72 + 71 + 14 =
  23. 23.59 + 17 + 73 + 22 =
  24. 24.30 + 28 + 88 + 15 =
  25. 25.13 + 68 + 69 + 51 =
  26. 26.49 + 48 + 82 + 60 =
  27. 27.73 + 26 + 43 + 28 =
  28. 28.47 + 27 + 79 + 22 =
  29. 29.20 + 69 + 50 + 77 =
  30. 30.23 + 31 + 12 + 89 =
  31. 31.21 + 43 + 35 + 40 =
  32. 32.16 + 83 + 25 + 15 =
  33. 33.72 + 59 + 71 + 18 =
  34. 34.65 + 24 + 70 + 35 =
  35. 35.83 + 33 + 28 + 31 =
  36. 36.15 + 56 + 69 + 32 =
  37. 37.46 + 13 + 14 + 81 =
  38. 38.13 + 24 + 80 + 49 =
  39. 39.78 + 54 + 39 + 63 =
  40. 40.54 + 69 + 21 + 45 =

Answer key

  1. 196
  2. 189
  3. 154
  4. 221
  5. 159
  6. 231
  7. 138
  8. 175
  9. 135
  10. 205
  11. 62
  12. 217
  13. 186
  14. 209
  15. 287
  16. 164
  17. 197
  18. 259
  19. 202
  20. 166
  21. 242
  22. 231
  23. 171
  24. 161
  25. 201
  26. 239
  27. 170
  28. 175
  29. 216
  30. 155
  31. 139
  32. 139
  33. 220
  34. 194
  35. 175
  36. 172
  37. 154
  38. 166
  39. 234
  40. 189

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