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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 337 · 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. 1.28 + 29 + 14 + 58 =
  2. 2.56 + 54 + 16 + 14 =
  3. 3.24 + 31 + 76 + 58 =
  4. 4.73 + 40 + 24 + 34 =
  5. 5.79 + 35 + 73 + 72 =
  6. 6.59 + 39 + 24 + 50 =
  7. 7.25 + 64 + 74 + 52 =
  8. 8.47 + 73 + 13 + 84 =
  9. 9.76 + 59 + 11 + 68 =
  10. 10.69 + 68 + 82 + 39 =
  11. 11.11 + 61 + 17 + 40 =
  12. 12.24 + 77 + 19 + 64 =
  13. 13.19 + 45 + 63 + 64 =
  14. 14.52 + 80 + 19 + 53 =
  15. 15.39 + 35 + 65 + 38 =
  16. 16.64 + 54 + 33 + 47 =
  17. 17.16 + 39 + 88 + 31 =
  18. 18.34 + 30 + 74 + 46 =
  19. 19.15 + 73 + 21 + 37 =
  20. 20.75 + 30 + 67 + 24 =
  21. 21.57 + 63 + 73 + 25 =
  22. 22.37 + 48 + 83 + 34 =
  23. 23.22 + 43 + 65 + 81 =
  24. 24.18 + 11 + 88 + 35 =
  25. 25.40 + 49 + 58 + 27 =
  26. 26.81 + 54 + 12 + 40 =
  27. 27.15 + 37 + 60 + 80 =
  28. 28.30 + 34 + 43 + 45 =
  29. 29.80 + 39 + 27 + 38 =
  30. 30.69 + 52 + 32 + 11 =
  31. 31.63 + 14 + 30 + 67 =
  32. 32.68 + 15 + 29 + 74 =
  33. 33.41 + 21 + 54 + 37 =
  34. 34.14 + 11 + 83 + 75 =
  35. 35.24 + 28 + 16 + 44 =
  36. 36.67 + 62 + 54 + 68 =
  37. 37.78 + 34 + 19 + 29 =
  38. 38.30 + 26 + 89 + 69 =
  39. 39.52 + 53 + 16 + 29 =
  40. 40.71 + 28 + 72 + 27 =

Answer key

  1. 129
  2. 140
  3. 189
  4. 171
  5. 259
  6. 172
  7. 215
  8. 217
  9. 214
  10. 258
  11. 129
  12. 184
  13. 191
  14. 204
  15. 177
  16. 198
  17. 174
  18. 184
  19. 146
  20. 196
  21. 218
  22. 202
  23. 211
  24. 152
  25. 174
  26. 187
  27. 192
  28. 152
  29. 184
  30. 164
  31. 174
  32. 186
  33. 153
  34. 183
  35. 112
  36. 251
  37. 160
  38. 214
  39. 150
  40. 198

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