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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 526 · 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. 1.13 + 16 + 55 + 80 =
  2. 2.71 + 59 + 15 + 20 =
  3. 3.30 + 67 + 38 + 12 =
  4. 4.17 + 51 + 74 + 53 =
  5. 5.75 + 23 + 61 + 15 =
  6. 6.49 + 15 + 86 + 15 =
  7. 7.36 + 51 + 36 + 14 =
  8. 8.47 + 20 + 79 + 43 =
  9. 9.35 + 48 + 26 + 51 =
  10. 10.87 + 75 + 85 + 32 =
  11. 11.76 + 43 + 21 + 21 =
  12. 12.73 + 18 + 33 + 29 =
  13. 13.29 + 87 + 38 + 15 =
  14. 14.85 + 29 + 66 + 66 =
  15. 15.76 + 76 + 22 + 63 =
  16. 16.58 + 88 + 83 + 36 =
  17. 17.79 + 56 + 30 + 53 =
  18. 18.46 + 16 + 58 + 72 =
  19. 19.25 + 28 + 75 + 19 =
  20. 20.51 + 63 + 60 + 67 =
  21. 21.34 + 21 + 11 + 20 =
  22. 22.34 + 79 + 66 + 46 =
  23. 23.89 + 33 + 78 + 21 =
  24. 24.11 + 61 + 88 + 28 =
  25. 25.14 + 76 + 22 + 39 =
  26. 26.65 + 48 + 11 + 16 =
  27. 27.63 + 28 + 55 + 67 =
  28. 28.39 + 36 + 46 + 13 =
  29. 29.55 + 18 + 69 + 67 =
  30. 30.59 + 51 + 58 + 43 =
  31. 31.28 + 88 + 12 + 68 =
  32. 32.37 + 14 + 89 + 36 =
  33. 33.22 + 54 + 51 + 88 =
  34. 34.13 + 31 + 29 + 23 =
  35. 35.76 + 71 + 76 + 28 =
  36. 36.21 + 30 + 69 + 31 =
  37. 37.81 + 39 + 46 + 11 =
  38. 38.68 + 77 + 71 + 54 =
  39. 39.76 + 52 + 21 + 59 =
  40. 40.21 + 83 + 27 + 21 =

Answer key

  1. 164
  2. 165
  3. 147
  4. 195
  5. 174
  6. 165
  7. 137
  8. 189
  9. 160
  10. 279
  11. 161
  12. 153
  13. 169
  14. 246
  15. 237
  16. 265
  17. 218
  18. 192
  19. 147
  20. 241
  21. 86
  22. 225
  23. 221
  24. 188
  25. 151
  26. 140
  27. 213
  28. 134
  29. 209
  30. 211
  31. 196
  32. 176
  33. 215
  34. 96
  35. 251
  36. 151
  37. 177
  38. 270
  39. 208
  40. 152

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