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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 601 · 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. 1.57 + 55 + 63 + 44 =
  2. 2.28 + 11 + 23 + 20 =
  3. 3.31 + 52 + 33 + 20 =
  4. 4.31 + 23 + 44 + 14 =
  5. 5.29 + 11 + 76 + 43 =
  6. 6.34 + 15 + 75 + 74 =
  7. 7.54 + 70 + 64 + 84 =
  8. 8.58 + 18 + 70 + 38 =
  9. 9.54 + 52 + 81 + 25 =
  10. 10.77 + 42 + 26 + 46 =
  11. 11.46 + 66 + 74 + 37 =
  12. 12.32 + 71 + 87 + 12 =
  13. 13.15 + 56 + 62 + 20 =
  14. 14.83 + 26 + 70 + 29 =
  15. 15.44 + 83 + 53 + 71 =
  16. 16.22 + 82 + 26 + 11 =
  17. 17.44 + 45 + 22 + 86 =
  18. 18.77 + 69 + 24 + 78 =
  19. 19.17 + 81 + 88 + 47 =
  20. 20.25 + 29 + 12 + 22 =
  21. 21.31 + 59 + 11 + 74 =
  22. 22.66 + 61 + 16 + 62 =
  23. 23.55 + 52 + 83 + 34 =
  24. 24.59 + 45 + 29 + 45 =
  25. 25.58 + 75 + 85 + 56 =
  26. 26.76 + 58 + 68 + 49 =
  27. 27.47 + 39 + 47 + 85 =
  28. 28.11 + 40 + 67 + 22 =
  29. 29.89 + 16 + 83 + 31 =
  30. 30.23 + 86 + 53 + 50 =
  31. 31.64 + 18 + 11 + 37 =
  32. 32.71 + 27 + 15 + 89 =
  33. 33.26 + 43 + 49 + 55 =
  34. 34.21 + 16 + 24 + 64 =
  35. 35.59 + 49 + 81 + 33 =
  36. 36.19 + 58 + 66 + 14 =
  37. 37.38 + 63 + 38 + 13 =
  38. 38.68 + 13 + 89 + 24 =
  39. 39.42 + 20 + 60 + 49 =
  40. 40.68 + 13 + 41 + 40 =

Answer key

  1. 219
  2. 82
  3. 136
  4. 112
  5. 159
  6. 198
  7. 272
  8. 184
  9. 212
  10. 191
  11. 223
  12. 202
  13. 153
  14. 208
  15. 251
  16. 141
  17. 197
  18. 248
  19. 233
  20. 88
  21. 175
  22. 205
  23. 224
  24. 178
  25. 274
  26. 251
  27. 218
  28. 140
  29. 219
  30. 212
  31. 130
  32. 202
  33. 173
  34. 125
  35. 222
  36. 157
  37. 152
  38. 194
  39. 171
  40. 162

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