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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 724 · 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. 1.37 + 37 + 23 + 75 =
  2. 2.35 + 17 + 26 + 34 =
  3. 3.35 + 76 + 47 + 60 =
  4. 4.26 + 62 + 43 + 79 =
  5. 5.50 + 28 + 50 + 43 =
  6. 6.57 + 36 + 67 + 24 =
  7. 7.42 + 34 + 72 + 26 =
  8. 8.41 + 63 + 38 + 57 =
  9. 9.33 + 65 + 39 + 56 =
  10. 10.32 + 37 + 88 + 29 =
  11. 11.76 + 27 + 78 + 56 =
  12. 12.25 + 58 + 24 + 31 =
  13. 13.72 + 52 + 16 + 14 =
  14. 14.49 + 12 + 26 + 63 =
  15. 15.31 + 43 + 34 + 49 =
  16. 16.52 + 60 + 57 + 23 =
  17. 17.76 + 19 + 84 + 14 =
  18. 18.63 + 34 + 29 + 60 =
  19. 19.64 + 71 + 70 + 84 =
  20. 20.75 + 38 + 58 + 25 =
  21. 21.22 + 17 + 14 + 69 =
  22. 22.79 + 51 + 23 + 33 =
  23. 23.60 + 24 + 44 + 29 =
  24. 24.23 + 29 + 80 + 72 =
  25. 25.16 + 55 + 14 + 83 =
  26. 26.29 + 78 + 30 + 65 =
  27. 27.64 + 23 + 66 + 28 =
  28. 28.57 + 46 + 28 + 16 =
  29. 29.78 + 83 + 28 + 67 =
  30. 30.55 + 68 + 62 + 12 =
  31. 31.64 + 29 + 25 + 31 =
  32. 32.18 + 77 + 26 + 39 =
  33. 33.13 + 71 + 82 + 82 =
  34. 34.11 + 63 + 22 + 76 =
  35. 35.62 + 53 + 42 + 61 =
  36. 36.23 + 69 + 85 + 75 =
  37. 37.41 + 49 + 13 + 80 =
  38. 38.56 + 33 + 43 + 19 =
  39. 39.14 + 23 + 42 + 83 =
  40. 40.27 + 36 + 83 + 14 =

Answer key

  1. 172
  2. 112
  3. 218
  4. 210
  5. 171
  6. 184
  7. 174
  8. 199
  9. 193
  10. 186
  11. 237
  12. 138
  13. 154
  14. 150
  15. 157
  16. 192
  17. 193
  18. 186
  19. 289
  20. 196
  21. 122
  22. 186
  23. 157
  24. 204
  25. 168
  26. 202
  27. 181
  28. 147
  29. 256
  30. 197
  31. 149
  32. 160
  33. 248
  34. 172
  35. 218
  36. 252
  37. 183
  38. 151
  39. 162
  40. 160

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