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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 21 · 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. 1.84 + 85 + 84 + 27 =
  2. 2.35 + 29 + 39 + 51 =
  3. 3.49 + 44 + 76 + 52 =
  4. 4.60 + 77 + 65 + 88 =
  5. 5.86 + 42 + 23 + 64 =
  6. 6.86 + 28 + 47 + 66 =
  7. 7.81 + 32 + 15 + 25 =
  8. 8.15 + 29 + 81 + 27 =
  9. 9.13 + 49 + 33 + 38 =
  10. 10.62 + 62 + 29 + 25 =
  11. 11.28 + 52 + 56 + 66 =
  12. 12.85 + 31 + 80 + 58 =
  13. 13.86 + 29 + 19 + 84 =
  14. 14.29 + 76 + 36 + 48 =
  15. 15.45 + 32 + 32 + 41 =
  16. 16.79 + 59 + 50 + 64 =
  17. 17.51 + 73 + 20 + 12 =
  18. 18.41 + 15 + 17 + 43 =
  19. 19.14 + 70 + 48 + 21 =
  20. 20.16 + 32 + 59 + 68 =
  21. 21.44 + 49 + 34 + 25 =
  22. 22.63 + 75 + 44 + 67 =
  23. 23.81 + 22 + 28 + 21 =
  24. 24.33 + 36 + 43 + 59 =
  25. 25.59 + 29 + 78 + 28 =
  26. 26.87 + 25 + 11 + 21 =
  27. 27.64 + 71 + 43 + 35 =
  28. 28.44 + 19 + 88 + 62 =
  29. 29.86 + 81 + 82 + 60 =
  30. 30.89 + 87 + 48 + 55 =
  31. 31.34 + 27 + 66 + 15 =
  32. 32.29 + 25 + 55 + 17 =
  33. 33.38 + 39 + 49 + 85 =
  34. 34.18 + 27 + 84 + 59 =
  35. 35.33 + 24 + 78 + 14 =
  36. 36.32 + 27 + 21 + 88 =
  37. 37.66 + 38 + 54 + 17 =
  38. 38.32 + 84 + 77 + 15 =
  39. 39.69 + 88 + 31 + 51 =
  40. 40.73 + 13 + 65 + 89 =

Answer key

  1. 280
  2. 154
  3. 221
  4. 290
  5. 215
  6. 227
  7. 153
  8. 152
  9. 133
  10. 178
  11. 202
  12. 254
  13. 218
  14. 189
  15. 150
  16. 252
  17. 156
  18. 116
  19. 153
  20. 175
  21. 152
  22. 249
  23. 152
  24. 171
  25. 194
  26. 144
  27. 213
  28. 213
  29. 309
  30. 279
  31. 142
  32. 126
  33. 211
  34. 188
  35. 149
  36. 168
  37. 175
  38. 208
  39. 239
  40. 240

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