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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 265 · 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. 1.44 + 84 + 72 + 34 =
  2. 2.79 + 50 + 60 + 21 =
  3. 3.12 + 21 + 37 + 71 =
  4. 4.82 + 18 + 25 + 87 =
  5. 5.35 + 60 + 33 + 76 =
  6. 6.86 + 30 + 36 + 57 =
  7. 7.32 + 11 + 36 + 28 =
  8. 8.26 + 79 + 33 + 33 =
  9. 9.24 + 52 + 88 + 26 =
  10. 10.35 + 49 + 53 + 36 =
  11. 11.64 + 65 + 69 + 30 =
  12. 12.34 + 78 + 37 + 26 =
  13. 13.59 + 43 + 56 + 28 =
  14. 14.39 + 59 + 19 + 32 =
  15. 15.11 + 14 + 36 + 50 =
  16. 16.14 + 64 + 82 + 28 =
  17. 17.33 + 67 + 35 + 32 =
  18. 18.31 + 12 + 51 + 12 =
  19. 19.25 + 57 + 81 + 31 =
  20. 20.44 + 87 + 78 + 13 =
  21. 21.51 + 28 + 89 + 35 =
  22. 22.31 + 14 + 89 + 88 =
  23. 23.28 + 44 + 28 + 61 =
  24. 24.26 + 22 + 67 + 83 =
  25. 25.20 + 48 + 34 + 13 =
  26. 26.85 + 70 + 82 + 85 =
  27. 27.43 + 71 + 87 + 52 =
  28. 28.71 + 12 + 15 + 20 =
  29. 29.37 + 27 + 27 + 45 =
  30. 30.44 + 21 + 66 + 12 =
  31. 31.59 + 15 + 89 + 38 =
  32. 32.75 + 13 + 47 + 46 =
  33. 33.64 + 59 + 40 + 76 =
  34. 34.23 + 24 + 78 + 18 =
  35. 35.79 + 81 + 34 + 76 =
  36. 36.17 + 54 + 12 + 51 =
  37. 37.89 + 73 + 61 + 12 =
  38. 38.23 + 66 + 33 + 66 =
  39. 39.68 + 38 + 21 + 36 =
  40. 40.78 + 72 + 28 + 21 =

Answer key

  1. 234
  2. 210
  3. 141
  4. 212
  5. 204
  6. 209
  7. 107
  8. 171
  9. 190
  10. 173
  11. 228
  12. 175
  13. 186
  14. 149
  15. 111
  16. 188
  17. 167
  18. 106
  19. 194
  20. 222
  21. 203
  22. 222
  23. 161
  24. 198
  25. 115
  26. 322
  27. 253
  28. 118
  29. 136
  30. 143
  31. 201
  32. 181
  33. 239
  34. 143
  35. 270
  36. 134
  37. 235
  38. 188
  39. 163
  40. 199

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