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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 116 · 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. 1.59 + 14 + 31 + 50 =
  2. 2.19 + 54 + 53 + 30 =
  3. 3.67 + 24 + 16 + 59 =
  4. 4.16 + 50 + 29 + 15 =
  5. 5.82 + 36 + 74 + 47 =
  6. 6.44 + 22 + 12 + 11 =
  7. 7.67 + 14 + 35 + 16 =
  8. 8.49 + 34 + 56 + 28 =
  9. 9.83 + 51 + 26 + 45 =
  10. 10.15 + 86 + 35 + 66 =
  11. 11.11 + 13 + 83 + 71 =
  12. 12.23 + 15 + 13 + 33 =
  13. 13.68 + 77 + 65 + 86 =
  14. 14.44 + 61 + 25 + 34 =
  15. 15.88 + 80 + 33 + 48 =
  16. 16.54 + 77 + 44 + 13 =
  17. 17.79 + 83 + 35 + 75 =
  18. 18.33 + 33 + 17 + 12 =
  19. 19.51 + 25 + 19 + 78 =
  20. 20.24 + 15 + 40 + 83 =
  21. 21.85 + 73 + 82 + 65 =
  22. 22.75 + 81 + 89 + 54 =
  23. 23.35 + 36 + 40 + 37 =
  24. 24.52 + 23 + 50 + 45 =
  25. 25.68 + 54 + 67 + 17 =
  26. 26.16 + 12 + 21 + 55 =
  27. 27.52 + 64 + 26 + 24 =
  28. 28.30 + 70 + 28 + 12 =
  29. 29.37 + 38 + 58 + 22 =
  30. 30.50 + 82 + 59 + 21 =
  31. 31.79 + 54 + 82 + 86 =
  32. 32.44 + 45 + 61 + 11 =
  33. 33.42 + 63 + 57 + 23 =
  34. 34.60 + 34 + 23 + 89 =
  35. 35.77 + 60 + 17 + 77 =
  36. 36.59 + 56 + 35 + 46 =
  37. 37.23 + 22 + 86 + 63 =
  38. 38.16 + 45 + 70 + 56 =
  39. 39.50 + 30 + 37 + 74 =
  40. 40.59 + 19 + 45 + 59 =

Answer key

  1. 154
  2. 156
  3. 166
  4. 110
  5. 239
  6. 89
  7. 132
  8. 167
  9. 205
  10. 202
  11. 178
  12. 84
  13. 296
  14. 164
  15. 249
  16. 188
  17. 272
  18. 95
  19. 173
  20. 162
  21. 305
  22. 299
  23. 148
  24. 170
  25. 206
  26. 104
  27. 166
  28. 140
  29. 155
  30. 212
  31. 301
  32. 161
  33. 185
  34. 206
  35. 231
  36. 196
  37. 194
  38. 187
  39. 191
  40. 182

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