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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 124 · 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. 1.66 + 36 + 16 + 44 =
  2. 2.23 + 74 + 35 + 18 =
  3. 3.88 + 81 + 80 + 58 =
  4. 4.40 + 14 + 39 + 44 =
  5. 5.25 + 15 + 79 + 61 =
  6. 6.27 + 36 + 21 + 60 =
  7. 7.79 + 80 + 32 + 17 =
  8. 8.44 + 62 + 78 + 40 =
  9. 9.60 + 75 + 73 + 80 =
  10. 10.26 + 36 + 48 + 73 =
  11. 11.35 + 12 + 30 + 14 =
  12. 12.28 + 45 + 47 + 52 =
  13. 13.84 + 42 + 29 + 76 =
  14. 14.31 + 67 + 22 + 56 =
  15. 15.74 + 79 + 57 + 42 =
  16. 16.60 + 53 + 17 + 76 =
  17. 17.73 + 26 + 88 + 41 =
  18. 18.81 + 44 + 56 + 28 =
  19. 19.23 + 18 + 53 + 24 =
  20. 20.50 + 51 + 51 + 47 =
  21. 21.84 + 15 + 89 + 57 =
  22. 22.82 + 73 + 28 + 62 =
  23. 23.59 + 25 + 39 + 53 =
  24. 24.20 + 52 + 26 + 47 =
  25. 25.17 + 47 + 64 + 36 =
  26. 26.17 + 82 + 78 + 33 =
  27. 27.23 + 32 + 80 + 25 =
  28. 28.62 + 78 + 41 + 66 =
  29. 29.70 + 60 + 37 + 37 =
  30. 30.54 + 33 + 58 + 13 =
  31. 31.68 + 66 + 58 + 46 =
  32. 32.52 + 55 + 71 + 32 =
  33. 33.30 + 34 + 71 + 29 =
  34. 34.32 + 82 + 22 + 33 =
  35. 35.11 + 23 + 21 + 18 =
  36. 36.17 + 79 + 81 + 68 =
  37. 37.78 + 34 + 44 + 39 =
  38. 38.68 + 39 + 16 + 36 =
  39. 39.57 + 36 + 59 + 89 =
  40. 40.81 + 81 + 30 + 47 =

Answer key

  1. 162
  2. 150
  3. 307
  4. 137
  5. 180
  6. 144
  7. 208
  8. 224
  9. 288
  10. 183
  11. 91
  12. 172
  13. 231
  14. 176
  15. 252
  16. 206
  17. 228
  18. 209
  19. 118
  20. 199
  21. 245
  22. 245
  23. 176
  24. 145
  25. 164
  26. 210
  27. 160
  28. 247
  29. 204
  30. 158
  31. 238
  32. 210
  33. 164
  34. 169
  35. 73
  36. 245
  37. 195
  38. 159
  39. 241
  40. 239

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