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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 504 · 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. 1.17 + 70 + 66 + 14 =
  2. 2.23 + 70 + 25 + 49 =
  3. 3.87 + 47 + 52 + 81 =
  4. 4.76 + 85 + 50 + 54 =
  5. 5.24 + 41 + 64 + 63 =
  6. 6.41 + 79 + 68 + 29 =
  7. 7.77 + 14 + 78 + 33 =
  8. 8.24 + 17 + 72 + 39 =
  9. 9.84 + 16 + 20 + 73 =
  10. 10.81 + 33 + 58 + 66 =
  11. 11.82 + 51 + 26 + 40 =
  12. 12.25 + 13 + 71 + 75 =
  13. 13.36 + 84 + 38 + 89 =
  14. 14.15 + 45 + 77 + 72 =
  15. 15.75 + 82 + 47 + 53 =
  16. 16.28 + 44 + 56 + 38 =
  17. 17.30 + 82 + 82 + 66 =
  18. 18.11 + 32 + 54 + 46 =
  19. 19.48 + 88 + 58 + 26 =
  20. 20.64 + 49 + 83 + 45 =
  21. 21.27 + 22 + 66 + 49 =
  22. 22.38 + 32 + 64 + 31 =
  23. 23.71 + 24 + 23 + 73 =
  24. 24.48 + 59 + 11 + 48 =
  25. 25.33 + 84 + 31 + 57 =
  26. 26.59 + 81 + 64 + 65 =
  27. 27.34 + 17 + 21 + 45 =
  28. 28.27 + 17 + 88 + 19 =
  29. 29.24 + 84 + 55 + 84 =
  30. 30.67 + 20 + 78 + 34 =
  31. 31.50 + 26 + 81 + 82 =
  32. 32.63 + 27 + 61 + 75 =
  33. 33.11 + 25 + 28 + 55 =
  34. 34.88 + 23 + 47 + 53 =
  35. 35.63 + 44 + 16 + 25 =
  36. 36.51 + 77 + 71 + 16 =
  37. 37.49 + 43 + 75 + 85 =
  38. 38.26 + 73 + 12 + 82 =
  39. 39.78 + 24 + 86 + 30 =
  40. 40.60 + 17 + 80 + 11 =

Answer key

  1. 167
  2. 167
  3. 267
  4. 265
  5. 192
  6. 217
  7. 202
  8. 152
  9. 193
  10. 238
  11. 199
  12. 184
  13. 247
  14. 209
  15. 257
  16. 166
  17. 260
  18. 143
  19. 220
  20. 241
  21. 164
  22. 165
  23. 191
  24. 166
  25. 205
  26. 269
  27. 117
  28. 151
  29. 247
  30. 199
  31. 239
  32. 226
  33. 119
  34. 211
  35. 148
  36. 215
  37. 252
  38. 193
  39. 218
  40. 168

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