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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 266 · 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 + 15 + 23 + 48 =
  2. 2.67 + 19 + 22 + 62 =
  3. 3.21 + 63 + 13 + 58 =
  4. 4.46 + 17 + 83 + 42 =
  5. 5.47 + 37 + 34 + 25 =
  6. 6.15 + 82 + 22 + 76 =
  7. 7.48 + 22 + 26 + 34 =
  8. 8.65 + 65 + 71 + 29 =
  9. 9.72 + 84 + 43 + 66 =
  10. 10.20 + 55 + 71 + 12 =
  11. 11.56 + 32 + 54 + 72 =
  12. 12.40 + 61 + 69 + 47 =
  13. 13.12 + 22 + 52 + 21 =
  14. 14.62 + 36 + 29 + 66 =
  15. 15.38 + 31 + 43 + 24 =
  16. 16.20 + 77 + 35 + 34 =
  17. 17.33 + 49 + 58 + 61 =
  18. 18.46 + 69 + 28 + 39 =
  19. 19.31 + 78 + 38 + 16 =
  20. 20.19 + 12 + 86 + 46 =
  21. 21.13 + 46 + 13 + 39 =
  22. 22.65 + 41 + 85 + 68 =
  23. 23.44 + 33 + 42 + 32 =
  24. 24.50 + 66 + 11 + 43 =
  25. 25.44 + 83 + 18 + 23 =
  26. 26.47 + 22 + 77 + 27 =
  27. 27.84 + 37 + 85 + 74 =
  28. 28.28 + 52 + 72 + 70 =
  29. 29.74 + 25 + 86 + 48 =
  30. 30.89 + 78 + 12 + 41 =
  31. 31.70 + 20 + 12 + 74 =
  32. 32.30 + 12 + 19 + 59 =
  33. 33.37 + 19 + 12 + 12 =
  34. 34.13 + 83 + 84 + 19 =
  35. 35.49 + 34 + 60 + 58 =
  36. 36.65 + 67 + 15 + 54 =
  37. 37.53 + 52 + 63 + 18 =
  38. 38.64 + 84 + 62 + 86 =
  39. 39.13 + 82 + 43 + 49 =
  40. 40.59 + 89 + 26 + 27 =

Answer key

  1. 152
  2. 170
  3. 155
  4. 188
  5. 143
  6. 195
  7. 130
  8. 230
  9. 265
  10. 158
  11. 214
  12. 217
  13. 107
  14. 193
  15. 136
  16. 166
  17. 201
  18. 182
  19. 163
  20. 163
  21. 111
  22. 259
  23. 151
  24. 170
  25. 168
  26. 173
  27. 280
  28. 222
  29. 233
  30. 220
  31. 176
  32. 120
  33. 80
  34. 199
  35. 201
  36. 201
  37. 186
  38. 296
  39. 187
  40. 201

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