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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 517 · 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. 1.21 + 34 + 70 + 54 =
  2. 2.68 + 26 + 45 + 60 =
  3. 3.85 + 89 + 64 + 40 =
  4. 4.47 + 84 + 70 + 26 =
  5. 5.24 + 60 + 43 + 32 =
  6. 6.71 + 50 + 45 + 25 =
  7. 7.88 + 40 + 12 + 64 =
  8. 8.57 + 28 + 63 + 26 =
  9. 9.63 + 73 + 18 + 44 =
  10. 10.38 + 36 + 40 + 19 =
  11. 11.23 + 82 + 75 + 85 =
  12. 12.12 + 89 + 85 + 67 =
  13. 13.49 + 36 + 26 + 59 =
  14. 14.12 + 42 + 50 + 85 =
  15. 15.58 + 23 + 20 + 20 =
  16. 16.79 + 84 + 59 + 76 =
  17. 17.62 + 41 + 81 + 29 =
  18. 18.26 + 70 + 54 + 19 =
  19. 19.49 + 56 + 15 + 30 =
  20. 20.11 + 22 + 79 + 69 =
  21. 21.87 + 58 + 25 + 29 =
  22. 22.55 + 13 + 71 + 38 =
  23. 23.14 + 12 + 81 + 43 =
  24. 24.16 + 24 + 25 + 44 =
  25. 25.80 + 85 + 19 + 20 =
  26. 26.79 + 75 + 23 + 87 =
  27. 27.12 + 77 + 87 + 71 =
  28. 28.77 + 45 + 19 + 23 =
  29. 29.58 + 19 + 41 + 62 =
  30. 30.12 + 52 + 88 + 25 =
  31. 31.66 + 43 + 65 + 38 =
  32. 32.41 + 81 + 46 + 41 =
  33. 33.78 + 68 + 47 + 47 =
  34. 34.48 + 25 + 27 + 85 =
  35. 35.56 + 79 + 74 + 50 =
  36. 36.89 + 49 + 78 + 59 =
  37. 37.83 + 72 + 79 + 31 =
  38. 38.19 + 26 + 43 + 88 =
  39. 39.16 + 18 + 66 + 68 =
  40. 40.60 + 84 + 68 + 59 =

Answer key

  1. 179
  2. 199
  3. 278
  4. 227
  5. 159
  6. 191
  7. 204
  8. 174
  9. 198
  10. 133
  11. 265
  12. 253
  13. 170
  14. 189
  15. 121
  16. 298
  17. 213
  18. 169
  19. 150
  20. 181
  21. 199
  22. 177
  23. 150
  24. 109
  25. 204
  26. 264
  27. 247
  28. 164
  29. 180
  30. 177
  31. 212
  32. 209
  33. 240
  34. 185
  35. 259
  36. 275
  37. 265
  38. 176
  39. 168
  40. 271

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