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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 271 · 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. 1.64 + 82 + 51 + 17 =
  2. 2.11 + 39 + 70 + 19 =
  3. 3.80 + 74 + 53 + 19 =
  4. 4.30 + 62 + 64 + 30 =
  5. 5.32 + 51 + 11 + 54 =
  6. 6.35 + 81 + 45 + 14 =
  7. 7.48 + 44 + 58 + 49 =
  8. 8.79 + 41 + 23 + 11 =
  9. 9.68 + 21 + 32 + 70 =
  10. 10.63 + 70 + 25 + 37 =
  11. 11.13 + 56 + 26 + 42 =
  12. 12.48 + 11 + 32 + 40 =
  13. 13.54 + 16 + 77 + 53 =
  14. 14.18 + 69 + 47 + 23 =
  15. 15.80 + 16 + 19 + 72 =
  16. 16.71 + 17 + 31 + 59 =
  17. 17.85 + 89 + 13 + 11 =
  18. 18.11 + 25 + 87 + 59 =
  19. 19.83 + 73 + 25 + 17 =
  20. 20.18 + 49 + 73 + 17 =
  21. 21.23 + 18 + 28 + 70 =
  22. 22.85 + 37 + 85 + 34 =
  23. 23.36 + 22 + 25 + 29 =
  24. 24.84 + 61 + 56 + 34 =
  25. 25.22 + 18 + 82 + 54 =
  26. 26.21 + 32 + 87 + 63 =
  27. 27.40 + 28 + 41 + 85 =
  28. 28.20 + 83 + 71 + 17 =
  29. 29.41 + 24 + 23 + 61 =
  30. 30.49 + 35 + 22 + 39 =
  31. 31.21 + 41 + 33 + 71 =
  32. 32.36 + 41 + 69 + 13 =
  33. 33.61 + 27 + 77 + 61 =
  34. 34.85 + 28 + 43 + 36 =
  35. 35.31 + 50 + 76 + 31 =
  36. 36.69 + 49 + 44 + 23 =
  37. 37.83 + 29 + 58 + 13 =
  38. 38.61 + 55 + 22 + 32 =
  39. 39.89 + 53 + 31 + 68 =
  40. 40.81 + 26 + 32 + 34 =

Answer key

  1. 214
  2. 139
  3. 226
  4. 186
  5. 148
  6. 175
  7. 199
  8. 154
  9. 191
  10. 195
  11. 137
  12. 131
  13. 200
  14. 157
  15. 187
  16. 178
  17. 198
  18. 182
  19. 198
  20. 157
  21. 139
  22. 241
  23. 112
  24. 235
  25. 176
  26. 203
  27. 194
  28. 191
  29. 149
  30. 145
  31. 166
  32. 159
  33. 226
  34. 192
  35. 188
  36. 185
  37. 183
  38. 170
  39. 241
  40. 173

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