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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 39 · 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. 1.27 + 31 + 89 + 39 =
  2. 2.60 + 71 + 74 + 15 =
  3. 3.53 + 29 + 75 + 13 =
  4. 4.21 + 48 + 86 + 23 =
  5. 5.29 + 24 + 82 + 60 =
  6. 6.34 + 12 + 82 + 17 =
  7. 7.56 + 54 + 83 + 76 =
  8. 8.55 + 43 + 11 + 80 =
  9. 9.29 + 67 + 31 + 77 =
  10. 10.71 + 19 + 52 + 19 =
  11. 11.89 + 88 + 53 + 21 =
  12. 12.64 + 11 + 58 + 53 =
  13. 13.12 + 89 + 68 + 53 =
  14. 14.57 + 38 + 13 + 59 =
  15. 15.32 + 85 + 86 + 23 =
  16. 16.85 + 56 + 41 + 84 =
  17. 17.24 + 27 + 88 + 87 =
  18. 18.11 + 80 + 43 + 57 =
  19. 19.47 + 76 + 41 + 15 =
  20. 20.79 + 45 + 23 + 58 =
  21. 21.23 + 34 + 26 + 32 =
  22. 22.26 + 15 + 72 + 78 =
  23. 23.16 + 34 + 16 + 18 =
  24. 24.23 + 46 + 74 + 19 =
  25. 25.46 + 60 + 19 + 45 =
  26. 26.75 + 46 + 28 + 89 =
  27. 27.54 + 29 + 34 + 65 =
  28. 28.78 + 33 + 72 + 76 =
  29. 29.24 + 75 + 25 + 62 =
  30. 30.47 + 82 + 29 + 29 =
  31. 31.45 + 59 + 64 + 64 =
  32. 32.25 + 25 + 63 + 12 =
  33. 33.88 + 28 + 25 + 50 =
  34. 34.24 + 28 + 81 + 52 =
  35. 35.19 + 61 + 30 + 22 =
  36. 36.32 + 24 + 89 + 15 =
  37. 37.22 + 15 + 24 + 19 =
  38. 38.27 + 73 + 57 + 32 =
  39. 39.64 + 18 + 39 + 43 =
  40. 40.54 + 61 + 22 + 83 =

Answer key

  1. 186
  2. 220
  3. 170
  4. 178
  5. 195
  6. 145
  7. 269
  8. 189
  9. 204
  10. 161
  11. 251
  12. 186
  13. 222
  14. 167
  15. 226
  16. 266
  17. 226
  18. 191
  19. 179
  20. 205
  21. 115
  22. 191
  23. 84
  24. 162
  25. 170
  26. 238
  27. 182
  28. 259
  29. 186
  30. 187
  31. 232
  32. 125
  33. 191
  34. 185
  35. 132
  36. 160
  37. 80
  38. 189
  39. 164
  40. 220

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