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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 168 · 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. 1.82 + 80 + 67 + 39 =
  2. 2.74 + 78 + 30 + 45 =
  3. 3.41 + 21 + 60 + 51 =
  4. 4.76 + 33 + 83 + 31 =
  5. 5.24 + 12 + 87 + 47 =
  6. 6.83 + 81 + 21 + 34 =
  7. 7.68 + 30 + 12 + 31 =
  8. 8.76 + 59 + 50 + 79 =
  9. 9.65 + 32 + 89 + 31 =
  10. 10.13 + 21 + 40 + 35 =
  11. 11.68 + 60 + 11 + 47 =
  12. 12.11 + 71 + 43 + 70 =
  13. 13.37 + 56 + 71 + 63 =
  14. 14.11 + 83 + 33 + 24 =
  15. 15.26 + 42 + 75 + 25 =
  16. 16.73 + 73 + 83 + 46 =
  17. 17.35 + 22 + 44 + 20 =
  18. 18.59 + 47 + 36 + 73 =
  19. 19.61 + 42 + 11 + 29 =
  20. 20.84 + 35 + 30 + 18 =
  21. 21.50 + 22 + 43 + 51 =
  22. 22.54 + 15 + 76 + 15 =
  23. 23.41 + 88 + 43 + 40 =
  24. 24.57 + 56 + 20 + 89 =
  25. 25.32 + 29 + 32 + 64 =
  26. 26.62 + 28 + 78 + 79 =
  27. 27.27 + 75 + 77 + 85 =
  28. 28.38 + 16 + 36 + 33 =
  29. 29.23 + 29 + 87 + 56 =
  30. 30.60 + 46 + 89 + 74 =
  31. 31.25 + 50 + 21 + 75 =
  32. 32.39 + 87 + 36 + 39 =
  33. 33.59 + 76 + 23 + 88 =
  34. 34.16 + 20 + 79 + 15 =
  35. 35.68 + 78 + 15 + 52 =
  36. 36.55 + 13 + 81 + 42 =
  37. 37.20 + 73 + 42 + 47 =
  38. 38.47 + 43 + 12 + 46 =
  39. 39.73 + 13 + 24 + 63 =
  40. 40.87 + 75 + 39 + 78 =

Answer key

  1. 268
  2. 227
  3. 173
  4. 223
  5. 170
  6. 219
  7. 141
  8. 264
  9. 217
  10. 109
  11. 186
  12. 195
  13. 227
  14. 151
  15. 168
  16. 275
  17. 121
  18. 215
  19. 143
  20. 167
  21. 166
  22. 160
  23. 212
  24. 222
  25. 157
  26. 247
  27. 264
  28. 123
  29. 195
  30. 269
  31. 171
  32. 201
  33. 246
  34. 130
  35. 213
  36. 191
  37. 182
  38. 148
  39. 173
  40. 279

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