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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 391 · 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. 1.14 + 64 + 28 + 33 =
  2. 2.29 + 62 + 20 + 48 =
  3. 3.63 + 28 + 27 + 56 =
  4. 4.67 + 50 + 22 + 27 =
  5. 5.73 + 35 + 13 + 23 =
  6. 6.25 + 84 + 39 + 88 =
  7. 7.55 + 31 + 21 + 73 =
  8. 8.39 + 57 + 51 + 37 =
  9. 9.57 + 71 + 15 + 49 =
  10. 10.56 + 60 + 27 + 17 =
  11. 11.17 + 33 + 45 + 71 =
  12. 12.11 + 29 + 89 + 32 =
  13. 13.76 + 17 + 62 + 40 =
  14. 14.85 + 35 + 80 + 85 =
  15. 15.41 + 45 + 27 + 87 =
  16. 16.17 + 23 + 19 + 86 =
  17. 17.41 + 64 + 42 + 67 =
  18. 18.30 + 52 + 13 + 29 =
  19. 19.11 + 23 + 20 + 58 =
  20. 20.22 + 75 + 21 + 24 =
  21. 21.13 + 40 + 40 + 28 =
  22. 22.84 + 36 + 67 + 79 =
  23. 23.45 + 66 + 87 + 82 =
  24. 24.32 + 45 + 26 + 84 =
  25. 25.24 + 44 + 27 + 26 =
  26. 26.79 + 53 + 89 + 27 =
  27. 27.36 + 43 + 60 + 36 =
  28. 28.35 + 78 + 32 + 43 =
  29. 29.74 + 25 + 20 + 18 =
  30. 30.16 + 70 + 83 + 22 =
  31. 31.84 + 81 + 68 + 18 =
  32. 32.39 + 72 + 72 + 32 =
  33. 33.89 + 43 + 45 + 43 =
  34. 34.25 + 53 + 33 + 11 =
  35. 35.47 + 45 + 32 + 15 =
  36. 36.67 + 61 + 24 + 35 =
  37. 37.60 + 21 + 48 + 66 =
  38. 38.83 + 65 + 83 + 39 =
  39. 39.68 + 20 + 85 + 11 =
  40. 40.64 + 77 + 26 + 41 =

Answer key

  1. 139
  2. 159
  3. 174
  4. 166
  5. 144
  6. 236
  7. 180
  8. 184
  9. 192
  10. 160
  11. 166
  12. 161
  13. 195
  14. 285
  15. 200
  16. 145
  17. 214
  18. 124
  19. 112
  20. 142
  21. 121
  22. 266
  23. 280
  24. 187
  25. 121
  26. 248
  27. 175
  28. 188
  29. 137
  30. 191
  31. 251
  32. 215
  33. 220
  34. 122
  35. 139
  36. 187
  37. 195
  38. 270
  39. 184
  40. 208

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