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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 418 · 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. 1.36 + 76 + 17 + 15 =
  2. 2.43 + 21 + 15 + 11 =
  3. 3.45 + 15 + 41 + 11 =
  4. 4.13 + 15 + 44 + 67 =
  5. 5.26 + 22 + 27 + 31 =
  6. 6.34 + 39 + 55 + 12 =
  7. 7.87 + 69 + 47 + 75 =
  8. 8.19 + 24 + 72 + 48 =
  9. 9.32 + 32 + 29 + 47 =
  10. 10.89 + 70 + 80 + 20 =
  11. 11.52 + 46 + 68 + 13 =
  12. 12.75 + 41 + 72 + 53 =
  13. 13.82 + 13 + 35 + 73 =
  14. 14.79 + 63 + 21 + 63 =
  15. 15.64 + 34 + 74 + 20 =
  16. 16.30 + 40 + 13 + 41 =
  17. 17.17 + 50 + 56 + 67 =
  18. 18.89 + 45 + 85 + 67 =
  19. 19.26 + 82 + 83 + 33 =
  20. 20.33 + 45 + 29 + 81 =
  21. 21.70 + 33 + 55 + 55 =
  22. 22.45 + 66 + 79 + 42 =
  23. 23.46 + 25 + 59 + 11 =
  24. 24.74 + 49 + 89 + 20 =
  25. 25.55 + 35 + 72 + 29 =
  26. 26.55 + 16 + 54 + 67 =
  27. 27.37 + 37 + 48 + 19 =
  28. 28.34 + 31 + 54 + 79 =
  29. 29.60 + 82 + 26 + 63 =
  30. 30.23 + 72 + 23 + 80 =
  31. 31.32 + 78 + 11 + 34 =
  32. 32.89 + 87 + 17 + 27 =
  33. 33.67 + 24 + 84 + 74 =
  34. 34.47 + 44 + 78 + 11 =
  35. 35.72 + 56 + 21 + 21 =
  36. 36.82 + 42 + 71 + 18 =
  37. 37.26 + 15 + 41 + 86 =
  38. 38.84 + 30 + 40 + 55 =
  39. 39.59 + 31 + 24 + 18 =
  40. 40.64 + 68 + 44 + 88 =

Answer key

  1. 144
  2. 90
  3. 112
  4. 139
  5. 106
  6. 140
  7. 278
  8. 163
  9. 140
  10. 259
  11. 179
  12. 241
  13. 203
  14. 226
  15. 192
  16. 124
  17. 190
  18. 286
  19. 224
  20. 188
  21. 213
  22. 232
  23. 141
  24. 232
  25. 191
  26. 192
  27. 141
  28. 198
  29. 231
  30. 198
  31. 155
  32. 220
  33. 249
  34. 180
  35. 170
  36. 213
  37. 168
  38. 209
  39. 132
  40. 264

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