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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 108 · 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. 1.54 + 25 + 43 + 28 =
  2. 2.14 + 76 + 38 + 17 =
  3. 3.30 + 52 + 53 + 48 =
  4. 4.69 + 44 + 54 + 15 =
  5. 5.31 + 33 + 30 + 38 =
  6. 6.26 + 56 + 32 + 17 =
  7. 7.42 + 74 + 46 + 33 =
  8. 8.62 + 49 + 63 + 51 =
  9. 9.61 + 17 + 49 + 63 =
  10. 10.86 + 58 + 49 + 68 =
  11. 11.76 + 57 + 18 + 12 =
  12. 12.43 + 82 + 58 + 46 =
  13. 13.17 + 67 + 65 + 42 =
  14. 14.81 + 74 + 89 + 45 =
  15. 15.64 + 53 + 72 + 79 =
  16. 16.62 + 12 + 21 + 24 =
  17. 17.67 + 35 + 12 + 80 =
  18. 18.12 + 18 + 69 + 51 =
  19. 19.55 + 32 + 88 + 53 =
  20. 20.88 + 33 + 51 + 68 =
  21. 21.82 + 68 + 83 + 32 =
  22. 22.24 + 21 + 13 + 33 =
  23. 23.63 + 82 + 59 + 37 =
  24. 24.11 + 66 + 75 + 62 =
  25. 25.67 + 52 + 13 + 74 =
  26. 26.37 + 11 + 34 + 59 =
  27. 27.64 + 76 + 88 + 70 =
  28. 28.22 + 17 + 18 + 30 =
  29. 29.79 + 18 + 12 + 32 =
  30. 30.13 + 21 + 14 + 75 =
  31. 31.20 + 25 + 43 + 23 =
  32. 32.86 + 25 + 32 + 71 =
  33. 33.89 + 57 + 79 + 78 =
  34. 34.28 + 17 + 62 + 37 =
  35. 35.12 + 14 + 35 + 19 =
  36. 36.25 + 21 + 37 + 22 =
  37. 37.89 + 21 + 67 + 15 =
  38. 38.43 + 32 + 61 + 22 =
  39. 39.11 + 56 + 73 + 44 =
  40. 40.28 + 71 + 52 + 87 =

Answer key

  1. 150
  2. 145
  3. 183
  4. 182
  5. 132
  6. 131
  7. 195
  8. 225
  9. 190
  10. 261
  11. 163
  12. 229
  13. 191
  14. 289
  15. 268
  16. 119
  17. 194
  18. 150
  19. 228
  20. 240
  21. 265
  22. 91
  23. 241
  24. 214
  25. 206
  26. 141
  27. 298
  28. 87
  29. 141
  30. 123
  31. 111
  32. 214
  33. 303
  34. 144
  35. 80
  36. 105
  37. 192
  38. 158
  39. 184
  40. 238

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