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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 594 · 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. 1.72 + 26 + 33 + 21 =
  2. 2.81 + 87 + 80 + 67 =
  3. 3.69 + 89 + 24 + 50 =
  4. 4.79 + 28 + 16 + 78 =
  5. 5.31 + 61 + 15 + 70 =
  6. 6.47 + 12 + 84 + 50 =
  7. 7.23 + 72 + 83 + 78 =
  8. 8.17 + 29 + 19 + 63 =
  9. 9.32 + 46 + 85 + 60 =
  10. 10.67 + 29 + 25 + 21 =
  11. 11.33 + 42 + 45 + 52 =
  12. 12.53 + 32 + 27 + 43 =
  13. 13.28 + 81 + 26 + 38 =
  14. 14.40 + 26 + 23 + 42 =
  15. 15.11 + 22 + 25 + 61 =
  16. 16.73 + 74 + 48 + 55 =
  17. 17.20 + 55 + 26 + 27 =
  18. 18.50 + 40 + 58 + 49 =
  19. 19.37 + 35 + 19 + 37 =
  20. 20.32 + 20 + 34 + 46 =
  21. 21.78 + 11 + 28 + 20 =
  22. 22.14 + 54 + 60 + 53 =
  23. 23.40 + 18 + 73 + 58 =
  24. 24.50 + 75 + 16 + 38 =
  25. 25.16 + 84 + 77 + 17 =
  26. 26.21 + 30 + 88 + 50 =
  27. 27.76 + 30 + 88 + 76 =
  28. 28.32 + 78 + 27 + 75 =
  29. 29.58 + 46 + 15 + 21 =
  30. 30.47 + 26 + 83 + 55 =
  31. 31.57 + 34 + 14 + 12 =
  32. 32.64 + 44 + 37 + 86 =
  33. 33.50 + 74 + 58 + 67 =
  34. 34.74 + 40 + 89 + 69 =
  35. 35.81 + 49 + 78 + 63 =
  36. 36.36 + 82 + 21 + 21 =
  37. 37.61 + 35 + 20 + 30 =
  38. 38.51 + 88 + 45 + 17 =
  39. 39.21 + 23 + 44 + 68 =
  40. 40.35 + 37 + 74 + 30 =

Answer key

  1. 152
  2. 315
  3. 232
  4. 201
  5. 177
  6. 193
  7. 256
  8. 128
  9. 223
  10. 142
  11. 172
  12. 155
  13. 173
  14. 131
  15. 119
  16. 250
  17. 128
  18. 197
  19. 128
  20. 132
  21. 137
  22. 181
  23. 189
  24. 179
  25. 194
  26. 189
  27. 270
  28. 212
  29. 140
  30. 211
  31. 117
  32. 231
  33. 249
  34. 272
  35. 271
  36. 160
  37. 146
  38. 201
  39. 156
  40. 176

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