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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 759 · 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. 1.78 + 11 + 76 + 84 =
  2. 2.65 + 58 + 78 + 50 =
  3. 3.53 + 13 + 15 + 85 =
  4. 4.25 + 54 + 41 + 19 =
  5. 5.32 + 18 + 20 + 53 =
  6. 6.44 + 22 + 89 + 74 =
  7. 7.50 + 32 + 82 + 11 =
  8. 8.66 + 75 + 63 + 80 =
  9. 9.20 + 89 + 59 + 75 =
  10. 10.52 + 19 + 69 + 30 =
  11. 11.33 + 82 + 44 + 20 =
  12. 12.35 + 16 + 14 + 60 =
  13. 13.85 + 19 + 28 + 72 =
  14. 14.72 + 56 + 15 + 52 =
  15. 15.76 + 67 + 15 + 86 =
  16. 16.59 + 33 + 70 + 20 =
  17. 17.45 + 37 + 35 + 26 =
  18. 18.19 + 18 + 27 + 28 =
  19. 19.53 + 21 + 26 + 46 =
  20. 20.35 + 41 + 12 + 25 =
  21. 21.84 + 11 + 50 + 18 =
  22. 22.36 + 60 + 49 + 84 =
  23. 23.50 + 31 + 32 + 24 =
  24. 24.51 + 21 + 11 + 72 =
  25. 25.83 + 33 + 19 + 27 =
  26. 26.48 + 16 + 36 + 69 =
  27. 27.23 + 29 + 13 + 31 =
  28. 28.71 + 37 + 43 + 31 =
  29. 29.21 + 22 + 44 + 58 =
  30. 30.78 + 44 + 60 + 41 =
  31. 31.67 + 52 + 87 + 17 =
  32. 32.65 + 23 + 36 + 36 =
  33. 33.51 + 26 + 59 + 64 =
  34. 34.84 + 87 + 28 + 21 =
  35. 35.40 + 49 + 54 + 37 =
  36. 36.52 + 78 + 11 + 83 =
  37. 37.59 + 31 + 30 + 25 =
  38. 38.15 + 87 + 65 + 41 =
  39. 39.47 + 67 + 47 + 20 =
  40. 40.47 + 16 + 62 + 54 =

Answer key

  1. 249
  2. 251
  3. 166
  4. 139
  5. 123
  6. 229
  7. 175
  8. 284
  9. 243
  10. 170
  11. 179
  12. 125
  13. 204
  14. 195
  15. 244
  16. 182
  17. 143
  18. 92
  19. 146
  20. 113
  21. 163
  22. 229
  23. 137
  24. 155
  25. 162
  26. 169
  27. 96
  28. 182
  29. 145
  30. 223
  31. 223
  32. 160
  33. 200
  34. 220
  35. 180
  36. 224
  37. 145
  38. 208
  39. 181
  40. 179

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