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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 640 · 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. 1.54 + 74 + 36 + 23 =
  2. 2.85 + 77 + 61 + 29 =
  3. 3.47 + 69 + 64 + 49 =
  4. 4.22 + 24 + 46 + 56 =
  5. 5.36 + 41 + 63 + 62 =
  6. 6.67 + 25 + 13 + 35 =
  7. 7.46 + 23 + 37 + 16 =
  8. 8.81 + 21 + 57 + 59 =
  9. 9.32 + 89 + 87 + 85 =
  10. 10.80 + 89 + 31 + 30 =
  11. 11.25 + 28 + 89 + 73 =
  12. 12.23 + 71 + 85 + 16 =
  13. 13.21 + 89 + 63 + 46 =
  14. 14.42 + 78 + 42 + 27 =
  15. 15.78 + 76 + 88 + 23 =
  16. 16.24 + 40 + 17 + 79 =
  17. 17.66 + 72 + 25 + 29 =
  18. 18.11 + 64 + 32 + 43 =
  19. 19.45 + 70 + 76 + 86 =
  20. 20.59 + 58 + 43 + 55 =
  21. 21.20 + 39 + 60 + 83 =
  22. 22.81 + 33 + 22 + 17 =
  23. 23.62 + 46 + 58 + 11 =
  24. 24.26 + 75 + 33 + 71 =
  25. 25.49 + 78 + 48 + 68 =
  26. 26.82 + 42 + 24 + 33 =
  27. 27.76 + 41 + 34 + 41 =
  28. 28.31 + 69 + 35 + 89 =
  29. 29.78 + 87 + 47 + 22 =
  30. 30.25 + 84 + 60 + 32 =
  31. 31.59 + 30 + 12 + 70 =
  32. 32.12 + 26 + 73 + 40 =
  33. 33.52 + 72 + 12 + 58 =
  34. 34.28 + 24 + 30 + 55 =
  35. 35.24 + 33 + 20 + 56 =
  36. 36.26 + 75 + 89 + 23 =
  37. 37.51 + 48 + 72 + 31 =
  38. 38.59 + 64 + 85 + 14 =
  39. 39.12 + 27 + 71 + 21 =
  40. 40.32 + 76 + 20 + 24 =

Answer key

  1. 187
  2. 252
  3. 229
  4. 148
  5. 202
  6. 140
  7. 122
  8. 218
  9. 293
  10. 230
  11. 215
  12. 195
  13. 219
  14. 189
  15. 265
  16. 160
  17. 192
  18. 150
  19. 277
  20. 215
  21. 202
  22. 153
  23. 177
  24. 205
  25. 243
  26. 181
  27. 192
  28. 224
  29. 234
  30. 201
  31. 171
  32. 151
  33. 194
  34. 137
  35. 133
  36. 213
  37. 202
  38. 222
  39. 131
  40. 152

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