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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 780 · 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 + 80 + 40 + 25 =
  2. 2.48 + 16 + 59 + 62 =
  3. 3.11 + 73 + 54 + 83 =
  4. 4.51 + 28 + 88 + 31 =
  5. 5.30 + 12 + 86 + 66 =
  6. 6.22 + 52 + 35 + 75 =
  7. 7.37 + 43 + 60 + 27 =
  8. 8.15 + 32 + 14 + 42 =
  9. 9.53 + 43 + 48 + 49 =
  10. 10.20 + 12 + 57 + 58 =
  11. 11.44 + 49 + 49 + 76 =
  12. 12.20 + 25 + 49 + 11 =
  13. 13.39 + 25 + 40 + 11 =
  14. 14.54 + 81 + 38 + 43 =
  15. 15.87 + 40 + 49 + 46 =
  16. 16.25 + 53 + 21 + 13 =
  17. 17.76 + 15 + 22 + 51 =
  18. 18.86 + 75 + 49 + 36 =
  19. 19.23 + 56 + 59 + 23 =
  20. 20.72 + 49 + 48 + 73 =
  21. 21.31 + 44 + 27 + 68 =
  22. 22.14 + 60 + 15 + 42 =
  23. 23.24 + 76 + 84 + 31 =
  24. 24.19 + 65 + 49 + 80 =
  25. 25.26 + 19 + 38 + 71 =
  26. 26.15 + 40 + 66 + 30 =
  27. 27.26 + 37 + 65 + 42 =
  28. 28.48 + 34 + 52 + 32 =
  29. 29.54 + 50 + 61 + 20 =
  30. 30.72 + 11 + 70 + 24 =
  31. 31.84 + 82 + 76 + 27 =
  32. 32.12 + 34 + 27 + 76 =
  33. 33.82 + 71 + 38 + 48 =
  34. 34.69 + 29 + 50 + 31 =
  35. 35.22 + 84 + 35 + 68 =
  36. 36.43 + 85 + 19 + 13 =
  37. 37.60 + 14 + 20 + 42 =
  38. 38.49 + 81 + 21 + 63 =
  39. 39.44 + 46 + 30 + 18 =
  40. 40.69 + 88 + 49 + 33 =

Answer key

  1. 208
  2. 185
  3. 221
  4. 198
  5. 194
  6. 184
  7. 167
  8. 103
  9. 193
  10. 147
  11. 218
  12. 105
  13. 115
  14. 216
  15. 222
  16. 112
  17. 164
  18. 246
  19. 161
  20. 242
  21. 170
  22. 131
  23. 215
  24. 213
  25. 154
  26. 151
  27. 170
  28. 166
  29. 185
  30. 177
  31. 269
  32. 149
  33. 239
  34. 179
  35. 209
  36. 160
  37. 136
  38. 214
  39. 138
  40. 239

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