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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 106 · 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. 1.63 + 64 + 83 + 71 =
  2. 2.74 + 70 + 65 + 66 =
  3. 3.89 + 19 + 32 + 11 =
  4. 4.49 + 49 + 27 + 24 =
  5. 5.61 + 62 + 77 + 54 =
  6. 6.16 + 53 + 54 + 76 =
  7. 7.22 + 24 + 89 + 32 =
  8. 8.85 + 51 + 39 + 67 =
  9. 9.45 + 17 + 23 + 40 =
  10. 10.16 + 27 + 42 + 58 =
  11. 11.33 + 60 + 71 + 56 =
  12. 12.16 + 12 + 31 + 31 =
  13. 13.27 + 26 + 29 + 17 =
  14. 14.66 + 60 + 89 + 20 =
  15. 15.70 + 31 + 12 + 32 =
  16. 16.13 + 39 + 31 + 40 =
  17. 17.74 + 16 + 67 + 29 =
  18. 18.68 + 30 + 32 + 81 =
  19. 19.54 + 64 + 24 + 46 =
  20. 20.13 + 64 + 78 + 33 =
  21. 21.17 + 63 + 18 + 52 =
  22. 22.74 + 75 + 25 + 53 =
  23. 23.24 + 35 + 82 + 62 =
  24. 24.23 + 20 + 30 + 60 =
  25. 25.28 + 25 + 72 + 26 =
  26. 26.15 + 71 + 37 + 74 =
  27. 27.12 + 15 + 52 + 33 =
  28. 28.49 + 74 + 26 + 53 =
  29. 29.64 + 20 + 84 + 73 =
  30. 30.14 + 35 + 12 + 35 =
  31. 31.68 + 19 + 26 + 46 =
  32. 32.47 + 80 + 87 + 79 =
  33. 33.76 + 33 + 79 + 41 =
  34. 34.57 + 14 + 58 + 67 =
  35. 35.71 + 38 + 30 + 25 =
  36. 36.36 + 60 + 27 + 33 =
  37. 37.15 + 82 + 59 + 52 =
  38. 38.44 + 30 + 60 + 41 =
  39. 39.73 + 82 + 25 + 21 =
  40. 40.45 + 21 + 26 + 79 =

Answer key

  1. 281
  2. 275
  3. 151
  4. 149
  5. 254
  6. 199
  7. 167
  8. 242
  9. 125
  10. 143
  11. 220
  12. 90
  13. 99
  14. 235
  15. 145
  16. 123
  17. 186
  18. 211
  19. 188
  20. 188
  21. 150
  22. 227
  23. 203
  24. 133
  25. 151
  26. 197
  27. 112
  28. 202
  29. 241
  30. 96
  31. 159
  32. 293
  33. 229
  34. 196
  35. 164
  36. 156
  37. 208
  38. 175
  39. 201
  40. 171

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