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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 146 · 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. 1.86 + 63 + 22 + 82 =
  2. 2.27 + 26 + 84 + 38 =
  3. 3.24 + 15 + 68 + 44 =
  4. 4.11 + 85 + 21 + 11 =
  5. 5.83 + 70 + 65 + 15 =
  6. 6.34 + 24 + 24 + 64 =
  7. 7.55 + 14 + 84 + 79 =
  8. 8.52 + 79 + 77 + 21 =
  9. 9.83 + 79 + 63 + 89 =
  10. 10.71 + 37 + 38 + 87 =
  11. 11.74 + 79 + 73 + 42 =
  12. 12.52 + 25 + 20 + 74 =
  13. 13.27 + 62 + 89 + 44 =
  14. 14.63 + 53 + 76 + 17 =
  15. 15.26 + 15 + 51 + 55 =
  16. 16.79 + 67 + 31 + 17 =
  17. 17.22 + 50 + 50 + 63 =
  18. 18.34 + 26 + 86 + 33 =
  19. 19.45 + 20 + 69 + 70 =
  20. 20.29 + 40 + 19 + 70 =
  21. 21.46 + 63 + 57 + 75 =
  22. 22.61 + 52 + 75 + 29 =
  23. 23.86 + 85 + 73 + 16 =
  24. 24.53 + 32 + 78 + 76 =
  25. 25.30 + 15 + 60 + 24 =
  26. 26.83 + 23 + 80 + 68 =
  27. 27.60 + 43 + 69 + 47 =
  28. 28.63 + 66 + 86 + 16 =
  29. 29.32 + 83 + 25 + 21 =
  30. 30.62 + 75 + 34 + 70 =
  31. 31.32 + 79 + 14 + 17 =
  32. 32.46 + 13 + 86 + 33 =
  33. 33.14 + 20 + 19 + 82 =
  34. 34.28 + 57 + 48 + 41 =
  35. 35.42 + 16 + 60 + 17 =
  36. 36.11 + 27 + 23 + 35 =
  37. 37.52 + 75 + 89 + 78 =
  38. 38.78 + 61 + 71 + 19 =
  39. 39.11 + 29 + 29 + 30 =
  40. 40.22 + 49 + 89 + 89 =

Answer key

  1. 253
  2. 175
  3. 151
  4. 128
  5. 233
  6. 146
  7. 232
  8. 229
  9. 314
  10. 233
  11. 268
  12. 171
  13. 222
  14. 209
  15. 147
  16. 194
  17. 185
  18. 179
  19. 204
  20. 158
  21. 241
  22. 217
  23. 260
  24. 239
  25. 129
  26. 254
  27. 219
  28. 231
  29. 161
  30. 241
  31. 142
  32. 178
  33. 135
  34. 174
  35. 135
  36. 96
  37. 294
  38. 229
  39. 99
  40. 249

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