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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 121 · 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. 1.50 + 70 + 39 + 77 =
  2. 2.16 + 40 + 39 + 79 =
  3. 3.82 + 34 + 89 + 41 =
  4. 4.16 + 78 + 48 + 31 =
  5. 5.14 + 56 + 51 + 13 =
  6. 6.27 + 18 + 74 + 48 =
  7. 7.70 + 22 + 26 + 47 =
  8. 8.53 + 75 + 33 + 36 =
  9. 9.68 + 33 + 15 + 12 =
  10. 10.17 + 20 + 38 + 34 =
  11. 11.31 + 52 + 82 + 41 =
  12. 12.31 + 81 + 43 + 58 =
  13. 13.41 + 21 + 46 + 14 =
  14. 14.86 + 44 + 54 + 31 =
  15. 15.77 + 80 + 67 + 28 =
  16. 16.87 + 89 + 42 + 82 =
  17. 17.42 + 76 + 26 + 83 =
  18. 18.43 + 75 + 54 + 63 =
  19. 19.72 + 15 + 52 + 24 =
  20. 20.69 + 59 + 73 + 57 =
  21. 21.12 + 47 + 37 + 84 =
  22. 22.82 + 59 + 74 + 80 =
  23. 23.43 + 76 + 40 + 53 =
  24. 24.53 + 24 + 24 + 72 =
  25. 25.80 + 15 + 51 + 13 =
  26. 26.20 + 40 + 76 + 19 =
  27. 27.28 + 15 + 81 + 60 =
  28. 28.19 + 32 + 55 + 16 =
  29. 29.87 + 52 + 62 + 45 =
  30. 30.40 + 53 + 17 + 60 =
  31. 31.69 + 34 + 81 + 63 =
  32. 32.47 + 46 + 83 + 14 =
  33. 33.12 + 81 + 78 + 13 =
  34. 34.27 + 26 + 44 + 45 =
  35. 35.57 + 82 + 32 + 28 =
  36. 36.16 + 32 + 78 + 83 =
  37. 37.56 + 74 + 22 + 25 =
  38. 38.25 + 51 + 11 + 38 =
  39. 39.67 + 21 + 64 + 11 =
  40. 40.51 + 55 + 11 + 13 =

Answer key

  1. 236
  2. 174
  3. 246
  4. 173
  5. 134
  6. 167
  7. 165
  8. 197
  9. 128
  10. 109
  11. 206
  12. 213
  13. 122
  14. 215
  15. 252
  16. 300
  17. 227
  18. 235
  19. 163
  20. 258
  21. 180
  22. 295
  23. 212
  24. 173
  25. 159
  26. 155
  27. 184
  28. 122
  29. 246
  30. 170
  31. 247
  32. 190
  33. 184
  34. 142
  35. 199
  36. 209
  37. 177
  38. 125
  39. 163
  40. 130

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