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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 403 · 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. 1.65 + 24 + 58 + 63 =
  2. 2.21 + 22 + 21 + 53 =
  3. 3.64 + 81 + 18 + 35 =
  4. 4.25 + 12 + 73 + 34 =
  5. 5.78 + 59 + 21 + 87 =
  6. 6.79 + 42 + 33 + 52 =
  7. 7.78 + 15 + 68 + 14 =
  8. 8.50 + 63 + 11 + 88 =
  9. 9.20 + 41 + 19 + 64 =
  10. 10.72 + 30 + 79 + 15 =
  11. 11.78 + 22 + 63 + 63 =
  12. 12.38 + 36 + 59 + 61 =
  13. 13.89 + 75 + 32 + 29 =
  14. 14.19 + 17 + 26 + 22 =
  15. 15.46 + 48 + 21 + 27 =
  16. 16.36 + 39 + 63 + 33 =
  17. 17.36 + 12 + 77 + 36 =
  18. 18.65 + 75 + 39 + 56 =
  19. 19.67 + 43 + 17 + 69 =
  20. 20.29 + 29 + 41 + 72 =
  21. 21.32 + 49 + 87 + 56 =
  22. 22.78 + 31 + 34 + 81 =
  23. 23.75 + 25 + 86 + 45 =
  24. 24.76 + 76 + 74 + 71 =
  25. 25.55 + 46 + 46 + 32 =
  26. 26.11 + 84 + 13 + 11 =
  27. 27.52 + 28 + 19 + 50 =
  28. 28.37 + 26 + 41 + 84 =
  29. 29.45 + 11 + 14 + 67 =
  30. 30.28 + 11 + 28 + 89 =
  31. 31.33 + 65 + 62 + 43 =
  32. 32.39 + 65 + 89 + 40 =
  33. 33.36 + 68 + 12 + 45 =
  34. 34.12 + 26 + 44 + 56 =
  35. 35.20 + 26 + 14 + 34 =
  36. 36.78 + 45 + 29 + 49 =
  37. 37.17 + 73 + 36 + 77 =
  38. 38.53 + 32 + 59 + 56 =
  39. 39.26 + 20 + 17 + 60 =
  40. 40.87 + 27 + 59 + 19 =

Answer key

  1. 210
  2. 117
  3. 198
  4. 144
  5. 245
  6. 206
  7. 175
  8. 212
  9. 144
  10. 196
  11. 226
  12. 194
  13. 225
  14. 84
  15. 142
  16. 171
  17. 161
  18. 235
  19. 196
  20. 171
  21. 224
  22. 224
  23. 231
  24. 297
  25. 179
  26. 119
  27. 149
  28. 188
  29. 137
  30. 156
  31. 203
  32. 233
  33. 161
  34. 138
  35. 94
  36. 201
  37. 203
  38. 200
  39. 123
  40. 192

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