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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 383 · 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. 1.89 + 24 + 50 + 37 =
  2. 2.43 + 52 + 22 + 30 =
  3. 3.31 + 32 + 18 + 89 =
  4. 4.70 + 34 + 27 + 20 =
  5. 5.43 + 12 + 89 + 47 =
  6. 6.12 + 14 + 53 + 17 =
  7. 7.65 + 79 + 14 + 81 =
  8. 8.73 + 24 + 17 + 14 =
  9. 9.13 + 18 + 35 + 15 =
  10. 10.29 + 24 + 49 + 73 =
  11. 11.57 + 66 + 77 + 74 =
  12. 12.24 + 23 + 12 + 17 =
  13. 13.16 + 29 + 85 + 66 =
  14. 14.45 + 47 + 80 + 49 =
  15. 15.31 + 26 + 46 + 23 =
  16. 16.84 + 30 + 87 + 37 =
  17. 17.66 + 46 + 11 + 59 =
  18. 18.47 + 13 + 65 + 75 =
  19. 19.20 + 41 + 57 + 54 =
  20. 20.42 + 80 + 70 + 19 =
  21. 21.27 + 89 + 82 + 76 =
  22. 22.54 + 37 + 11 + 88 =
  23. 23.30 + 16 + 30 + 14 =
  24. 24.86 + 70 + 42 + 41 =
  25. 25.40 + 75 + 25 + 31 =
  26. 26.68 + 26 + 29 + 18 =
  27. 27.73 + 38 + 47 + 70 =
  28. 28.49 + 37 + 14 + 62 =
  29. 29.30 + 27 + 73 + 14 =
  30. 30.16 + 60 + 34 + 54 =
  31. 31.41 + 25 + 75 + 51 =
  32. 32.18 + 63 + 27 + 18 =
  33. 33.50 + 47 + 21 + 33 =
  34. 34.74 + 27 + 54 + 70 =
  35. 35.61 + 18 + 11 + 22 =
  36. 36.46 + 43 + 29 + 52 =
  37. 37.22 + 77 + 29 + 88 =
  38. 38.83 + 80 + 59 + 53 =
  39. 39.84 + 37 + 35 + 27 =
  40. 40.36 + 82 + 72 + 82 =

Answer key

  1. 200
  2. 147
  3. 170
  4. 151
  5. 191
  6. 96
  7. 239
  8. 128
  9. 81
  10. 175
  11. 274
  12. 76
  13. 196
  14. 221
  15. 126
  16. 238
  17. 182
  18. 200
  19. 172
  20. 211
  21. 274
  22. 190
  23. 90
  24. 239
  25. 171
  26. 141
  27. 228
  28. 162
  29. 144
  30. 164
  31. 192
  32. 126
  33. 151
  34. 225
  35. 112
  36. 170
  37. 216
  38. 275
  39. 183
  40. 272

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