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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 302 · 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. 1.69 + 11 + 22 + 57 =
  2. 2.67 + 54 + 37 + 20 =
  3. 3.22 + 18 + 17 + 86 =
  4. 4.11 + 48 + 50 + 25 =
  5. 5.49 + 32 + 86 + 56 =
  6. 6.27 + 50 + 78 + 34 =
  7. 7.28 + 19 + 40 + 41 =
  8. 8.39 + 31 + 51 + 23 =
  9. 9.52 + 55 + 71 + 67 =
  10. 10.75 + 73 + 31 + 40 =
  11. 11.57 + 12 + 22 + 88 =
  12. 12.50 + 38 + 50 + 65 =
  13. 13.17 + 61 + 18 + 30 =
  14. 14.82 + 79 + 38 + 60 =
  15. 15.12 + 19 + 35 + 63 =
  16. 16.67 + 82 + 46 + 85 =
  17. 17.83 + 26 + 80 + 53 =
  18. 18.31 + 14 + 69 + 32 =
  19. 19.23 + 75 + 25 + 33 =
  20. 20.50 + 24 + 51 + 74 =
  21. 21.51 + 88 + 60 + 11 =
  22. 22.28 + 83 + 84 + 64 =
  23. 23.75 + 44 + 73 + 49 =
  24. 24.31 + 32 + 69 + 66 =
  25. 25.86 + 23 + 67 + 22 =
  26. 26.76 + 79 + 66 + 62 =
  27. 27.87 + 14 + 43 + 31 =
  28. 28.46 + 46 + 77 + 87 =
  29. 29.89 + 71 + 63 + 86 =
  30. 30.31 + 74 + 52 + 14 =
  31. 31.85 + 23 + 56 + 63 =
  32. 32.27 + 11 + 85 + 53 =
  33. 33.68 + 25 + 19 + 79 =
  34. 34.61 + 17 + 42 + 11 =
  35. 35.30 + 85 + 29 + 19 =
  36. 36.22 + 30 + 51 + 84 =
  37. 37.56 + 44 + 62 + 37 =
  38. 38.48 + 80 + 78 + 68 =
  39. 39.22 + 68 + 58 + 51 =
  40. 40.29 + 87 + 44 + 70 =

Answer key

  1. 159
  2. 178
  3. 143
  4. 134
  5. 223
  6. 189
  7. 128
  8. 144
  9. 245
  10. 219
  11. 179
  12. 203
  13. 126
  14. 259
  15. 129
  16. 280
  17. 242
  18. 146
  19. 156
  20. 199
  21. 210
  22. 259
  23. 241
  24. 198
  25. 198
  26. 283
  27. 175
  28. 256
  29. 309
  30. 171
  31. 227
  32. 176
  33. 191
  34. 131
  35. 163
  36. 187
  37. 199
  38. 274
  39. 199
  40. 230

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