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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 511 · 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. 1.32 + 14 + 18 + 69 =
  2. 2.51 + 33 + 71 + 11 =
  3. 3.69 + 30 + 83 + 21 =
  4. 4.72 + 72 + 27 + 71 =
  5. 5.33 + 41 + 54 + 65 =
  6. 6.52 + 81 + 41 + 11 =
  7. 7.59 + 56 + 85 + 18 =
  8. 8.50 + 72 + 48 + 54 =
  9. 9.72 + 49 + 70 + 84 =
  10. 10.60 + 76 + 84 + 58 =
  11. 11.54 + 83 + 69 + 52 =
  12. 12.53 + 52 + 31 + 26 =
  13. 13.77 + 88 + 60 + 33 =
  14. 14.71 + 14 + 30 + 23 =
  15. 15.36 + 74 + 49 + 21 =
  16. 16.43 + 45 + 14 + 57 =
  17. 17.26 + 20 + 72 + 13 =
  18. 18.45 + 68 + 52 + 12 =
  19. 19.36 + 40 + 30 + 72 =
  20. 20.71 + 24 + 65 + 89 =
  21. 21.37 + 15 + 35 + 38 =
  22. 22.51 + 74 + 33 + 86 =
  23. 23.72 + 49 + 12 + 24 =
  24. 24.42 + 20 + 15 + 38 =
  25. 25.22 + 19 + 34 + 39 =
  26. 26.83 + 64 + 80 + 71 =
  27. 27.66 + 39 + 79 + 56 =
  28. 28.34 + 73 + 37 + 77 =
  29. 29.68 + 41 + 44 + 48 =
  30. 30.57 + 31 + 20 + 79 =
  31. 31.24 + 81 + 43 + 22 =
  32. 32.89 + 44 + 76 + 27 =
  33. 33.79 + 13 + 80 + 27 =
  34. 34.11 + 16 + 28 + 31 =
  35. 35.74 + 60 + 55 + 61 =
  36. 36.73 + 86 + 84 + 19 =
  37. 37.77 + 55 + 75 + 79 =
  38. 38.22 + 25 + 79 + 22 =
  39. 39.81 + 50 + 13 + 36 =
  40. 40.36 + 45 + 25 + 15 =

Answer key

  1. 133
  2. 166
  3. 203
  4. 242
  5. 193
  6. 185
  7. 218
  8. 224
  9. 275
  10. 278
  11. 258
  12. 162
  13. 258
  14. 138
  15. 180
  16. 159
  17. 131
  18. 177
  19. 178
  20. 249
  21. 125
  22. 244
  23. 157
  24. 115
  25. 114
  26. 298
  27. 240
  28. 221
  29. 201
  30. 187
  31. 170
  32. 236
  33. 199
  34. 86
  35. 250
  36. 262
  37. 286
  38. 148
  39. 180
  40. 121

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