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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 649 · 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 + 45 + 31 + 67 =
  2. 2.63 + 55 + 83 + 67 =
  3. 3.13 + 28 + 31 + 52 =
  4. 4.44 + 81 + 75 + 75 =
  5. 5.31 + 33 + 11 + 64 =
  6. 6.78 + 39 + 24 + 47 =
  7. 7.58 + 28 + 22 + 30 =
  8. 8.56 + 55 + 52 + 57 =
  9. 9.63 + 33 + 24 + 58 =
  10. 10.67 + 66 + 45 + 41 =
  11. 11.15 + 58 + 11 + 44 =
  12. 12.63 + 76 + 78 + 50 =
  13. 13.46 + 67 + 42 + 80 =
  14. 14.53 + 33 + 51 + 81 =
  15. 15.14 + 43 + 73 + 32 =
  16. 16.82 + 31 + 83 + 42 =
  17. 17.34 + 71 + 59 + 20 =
  18. 18.19 + 82 + 87 + 46 =
  19. 19.57 + 27 + 62 + 36 =
  20. 20.56 + 65 + 32 + 89 =
  21. 21.32 + 42 + 19 + 29 =
  22. 22.67 + 32 + 33 + 52 =
  23. 23.45 + 68 + 73 + 30 =
  24. 24.12 + 19 + 23 + 67 =
  25. 25.20 + 25 + 33 + 77 =
  26. 26.80 + 15 + 21 + 58 =
  27. 27.45 + 76 + 11 + 16 =
  28. 28.27 + 15 + 43 + 37 =
  29. 29.26 + 17 + 35 + 50 =
  30. 30.13 + 14 + 41 + 43 =
  31. 31.72 + 11 + 33 + 87 =
  32. 32.77 + 64 + 21 + 33 =
  33. 33.28 + 84 + 45 + 85 =
  34. 34.17 + 31 + 37 + 62 =
  35. 35.58 + 19 + 51 + 58 =
  36. 36.81 + 33 + 65 + 82 =
  37. 37.59 + 12 + 66 + 67 =
  38. 38.11 + 22 + 30 + 78 =
  39. 39.13 + 46 + 27 + 70 =
  40. 40.44 + 46 + 28 + 35 =

Answer key

  1. 212
  2. 268
  3. 124
  4. 275
  5. 139
  6. 188
  7. 138
  8. 220
  9. 178
  10. 219
  11. 128
  12. 267
  13. 235
  14. 218
  15. 162
  16. 238
  17. 184
  18. 234
  19. 182
  20. 242
  21. 122
  22. 184
  23. 216
  24. 121
  25. 155
  26. 174
  27. 148
  28. 122
  29. 128
  30. 111
  31. 203
  32. 195
  33. 242
  34. 147
  35. 186
  36. 261
  37. 204
  38. 141
  39. 156
  40. 153

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