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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 819 · 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. 1.24 + 20 + 76 + 76 =
  2. 2.41 + 65 + 21 + 87 =
  3. 3.37 + 73 + 50 + 84 =
  4. 4.21 + 53 + 20 + 14 =
  5. 5.84 + 17 + 11 + 83 =
  6. 6.45 + 40 + 69 + 13 =
  7. 7.35 + 44 + 26 + 56 =
  8. 8.15 + 50 + 52 + 59 =
  9. 9.52 + 53 + 63 + 53 =
  10. 10.57 + 71 + 32 + 21 =
  11. 11.60 + 18 + 38 + 86 =
  12. 12.52 + 49 + 12 + 11 =
  13. 13.16 + 39 + 18 + 36 =
  14. 14.42 + 73 + 48 + 58 =
  15. 15.50 + 37 + 84 + 22 =
  16. 16.74 + 34 + 79 + 25 =
  17. 17.57 + 14 + 14 + 23 =
  18. 18.27 + 16 + 13 + 31 =
  19. 19.89 + 70 + 59 + 37 =
  20. 20.56 + 11 + 81 + 81 =
  21. 21.32 + 17 + 48 + 38 =
  22. 22.41 + 17 + 58 + 65 =
  23. 23.17 + 34 + 15 + 78 =
  24. 24.50 + 87 + 77 + 30 =
  25. 25.76 + 18 + 25 + 11 =
  26. 26.33 + 46 + 32 + 39 =
  27. 27.89 + 29 + 51 + 16 =
  28. 28.18 + 40 + 68 + 51 =
  29. 29.36 + 60 + 33 + 83 =
  30. 30.57 + 42 + 64 + 63 =
  31. 31.60 + 42 + 15 + 66 =
  32. 32.68 + 20 + 25 + 58 =
  33. 33.41 + 82 + 44 + 33 =
  34. 34.15 + 28 + 18 + 59 =
  35. 35.35 + 78 + 61 + 23 =
  36. 36.38 + 41 + 33 + 15 =
  37. 37.71 + 85 + 47 + 58 =
  38. 38.86 + 68 + 14 + 88 =
  39. 39.65 + 43 + 42 + 84 =
  40. 40.15 + 67 + 64 + 12 =

Answer key

  1. 196
  2. 214
  3. 244
  4. 108
  5. 195
  6. 167
  7. 161
  8. 176
  9. 221
  10. 181
  11. 202
  12. 124
  13. 109
  14. 221
  15. 193
  16. 212
  17. 108
  18. 87
  19. 255
  20. 229
  21. 135
  22. 181
  23. 144
  24. 244
  25. 130
  26. 150
  27. 185
  28. 177
  29. 212
  30. 226
  31. 183
  32. 171
  33. 200
  34. 120
  35. 197
  36. 127
  37. 261
  38. 256
  39. 234
  40. 158

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