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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 363 · 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. 1.87 + 28 + 81 + 79 =
  2. 2.63 + 13 + 21 + 24 =
  3. 3.41 + 64 + 63 + 36 =
  4. 4.17 + 45 + 23 + 74 =
  5. 5.29 + 42 + 80 + 55 =
  6. 6.60 + 27 + 55 + 44 =
  7. 7.84 + 79 + 22 + 81 =
  8. 8.36 + 27 + 23 + 40 =
  9. 9.65 + 27 + 73 + 41 =
  10. 10.50 + 17 + 63 + 40 =
  11. 11.80 + 57 + 27 + 49 =
  12. 12.19 + 32 + 29 + 47 =
  13. 13.63 + 15 + 56 + 73 =
  14. 14.13 + 50 + 38 + 20 =
  15. 15.37 + 14 + 87 + 23 =
  16. 16.63 + 54 + 49 + 78 =
  17. 17.68 + 21 + 14 + 19 =
  18. 18.65 + 57 + 82 + 24 =
  19. 19.72 + 28 + 87 + 25 =
  20. 20.26 + 12 + 76 + 23 =
  21. 21.15 + 68 + 70 + 32 =
  22. 22.37 + 47 + 27 + 55 =
  23. 23.13 + 89 + 83 + 56 =
  24. 24.58 + 24 + 38 + 34 =
  25. 25.69 + 27 + 16 + 18 =
  26. 26.82 + 29 + 23 + 73 =
  27. 27.74 + 22 + 56 + 34 =
  28. 28.43 + 20 + 19 + 47 =
  29. 29.81 + 22 + 28 + 75 =
  30. 30.83 + 49 + 69 + 78 =
  31. 31.58 + 78 + 48 + 49 =
  32. 32.58 + 89 + 26 + 12 =
  33. 33.68 + 26 + 28 + 72 =
  34. 34.66 + 34 + 33 + 26 =
  35. 35.20 + 42 + 24 + 36 =
  36. 36.13 + 28 + 15 + 47 =
  37. 37.89 + 65 + 32 + 83 =
  38. 38.84 + 76 + 63 + 27 =
  39. 39.12 + 63 + 82 + 66 =
  40. 40.22 + 86 + 15 + 43 =

Answer key

  1. 275
  2. 121
  3. 204
  4. 159
  5. 206
  6. 186
  7. 266
  8. 126
  9. 206
  10. 170
  11. 213
  12. 127
  13. 207
  14. 121
  15. 161
  16. 244
  17. 122
  18. 228
  19. 212
  20. 137
  21. 185
  22. 166
  23. 241
  24. 154
  25. 130
  26. 207
  27. 186
  28. 129
  29. 206
  30. 279
  31. 233
  32. 185
  33. 194
  34. 159
  35. 122
  36. 103
  37. 269
  38. 250
  39. 223
  40. 166

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