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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 781 · 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. 1.52 + 53 + 19 + 35 =
  2. 2.18 + 50 + 29 + 43 =
  3. 3.22 + 66 + 22 + 75 =
  4. 4.59 + 23 + 77 + 25 =
  5. 5.63 + 47 + 43 + 81 =
  6. 6.18 + 20 + 25 + 57 =
  7. 7.29 + 24 + 35 + 22 =
  8. 8.23 + 51 + 34 + 37 =
  9. 9.41 + 40 + 83 + 76 =
  10. 10.51 + 65 + 38 + 22 =
  11. 11.48 + 60 + 65 + 35 =
  12. 12.34 + 62 + 78 + 31 =
  13. 13.33 + 14 + 26 + 40 =
  14. 14.86 + 61 + 29 + 39 =
  15. 15.71 + 64 + 27 + 24 =
  16. 16.87 + 12 + 29 + 26 =
  17. 17.65 + 26 + 67 + 41 =
  18. 18.64 + 86 + 22 + 82 =
  19. 19.87 + 76 + 25 + 13 =
  20. 20.72 + 11 + 52 + 60 =
  21. 21.53 + 17 + 38 + 57 =
  22. 22.57 + 39 + 41 + 35 =
  23. 23.84 + 41 + 31 + 32 =
  24. 24.33 + 79 + 37 + 55 =
  25. 25.81 + 30 + 42 + 53 =
  26. 26.29 + 37 + 58 + 71 =
  27. 27.21 + 78 + 18 + 39 =
  28. 28.13 + 19 + 69 + 85 =
  29. 29.57 + 23 + 56 + 82 =
  30. 30.72 + 29 + 12 + 11 =
  31. 31.65 + 63 + 67 + 22 =
  32. 32.56 + 49 + 37 + 78 =
  33. 33.61 + 88 + 62 + 46 =
  34. 34.84 + 47 + 80 + 16 =
  35. 35.50 + 65 + 41 + 54 =
  36. 36.20 + 50 + 81 + 65 =
  37. 37.36 + 83 + 14 + 81 =
  38. 38.72 + 20 + 44 + 70 =
  39. 39.68 + 86 + 15 + 63 =
  40. 40.39 + 78 + 66 + 41 =

Answer key

  1. 159
  2. 140
  3. 185
  4. 184
  5. 234
  6. 120
  7. 110
  8. 145
  9. 240
  10. 176
  11. 208
  12. 205
  13. 113
  14. 215
  15. 186
  16. 154
  17. 199
  18. 254
  19. 201
  20. 195
  21. 165
  22. 172
  23. 188
  24. 204
  25. 206
  26. 195
  27. 156
  28. 186
  29. 218
  30. 124
  31. 217
  32. 220
  33. 257
  34. 227
  35. 210
  36. 216
  37. 214
  38. 206
  39. 232
  40. 224

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