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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 297 · 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. 1.39 + 62 + 35 + 25 =
  2. 2.28 + 39 + 74 + 37 =
  3. 3.13 + 54 + 69 + 51 =
  4. 4.42 + 79 + 82 + 33 =
  5. 5.89 + 63 + 33 + 28 =
  6. 6.61 + 17 + 76 + 65 =
  7. 7.78 + 54 + 30 + 82 =
  8. 8.29 + 31 + 29 + 21 =
  9. 9.53 + 57 + 41 + 75 =
  10. 10.18 + 62 + 63 + 17 =
  11. 11.73 + 44 + 27 + 67 =
  12. 12.35 + 19 + 23 + 79 =
  13. 13.29 + 65 + 77 + 30 =
  14. 14.38 + 43 + 17 + 20 =
  15. 15.29 + 25 + 66 + 68 =
  16. 16.48 + 82 + 82 + 85 =
  17. 17.87 + 86 + 41 + 86 =
  18. 18.44 + 77 + 88 + 36 =
  19. 19.44 + 17 + 53 + 87 =
  20. 20.83 + 70 + 24 + 13 =
  21. 21.53 + 28 + 39 + 84 =
  22. 22.46 + 38 + 25 + 18 =
  23. 23.59 + 34 + 64 + 18 =
  24. 24.56 + 86 + 76 + 69 =
  25. 25.85 + 87 + 25 + 85 =
  26. 26.63 + 26 + 89 + 60 =
  27. 27.55 + 27 + 19 + 19 =
  28. 28.62 + 66 + 17 + 52 =
  29. 29.87 + 34 + 23 + 14 =
  30. 30.31 + 62 + 63 + 75 =
  31. 31.64 + 69 + 32 + 22 =
  32. 32.83 + 24 + 42 + 59 =
  33. 33.34 + 23 + 37 + 43 =
  34. 34.38 + 30 + 35 + 46 =
  35. 35.56 + 19 + 22 + 39 =
  36. 36.21 + 79 + 47 + 89 =
  37. 37.82 + 66 + 69 + 69 =
  38. 38.66 + 51 + 25 + 44 =
  39. 39.41 + 23 + 64 + 26 =
  40. 40.41 + 71 + 51 + 45 =

Answer key

  1. 161
  2. 178
  3. 187
  4. 236
  5. 213
  6. 219
  7. 244
  8. 110
  9. 226
  10. 160
  11. 211
  12. 156
  13. 201
  14. 118
  15. 188
  16. 297
  17. 300
  18. 245
  19. 201
  20. 190
  21. 204
  22. 127
  23. 175
  24. 287
  25. 282
  26. 238
  27. 120
  28. 197
  29. 158
  30. 231
  31. 187
  32. 208
  33. 137
  34. 149
  35. 136
  36. 236
  37. 286
  38. 186
  39. 154
  40. 208

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