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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 324 · 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. 1.26 + 84 + 18 + 77 =
  2. 2.40 + 19 + 53 + 27 =
  3. 3.62 + 35 + 88 + 74 =
  4. 4.25 + 26 + 32 + 45 =
  5. 5.67 + 80 + 25 + 47 =
  6. 6.34 + 26 + 61 + 60 =
  7. 7.39 + 47 + 78 + 54 =
  8. 8.58 + 48 + 44 + 59 =
  9. 9.38 + 58 + 14 + 24 =
  10. 10.72 + 86 + 60 + 72 =
  11. 11.23 + 44 + 39 + 87 =
  12. 12.33 + 68 + 57 + 29 =
  13. 13.44 + 76 + 78 + 29 =
  14. 14.32 + 36 + 71 + 57 =
  15. 15.32 + 31 + 64 + 36 =
  16. 16.30 + 68 + 71 + 28 =
  17. 17.75 + 60 + 71 + 29 =
  18. 18.67 + 36 + 30 + 30 =
  19. 19.84 + 12 + 27 + 61 =
  20. 20.60 + 14 + 11 + 59 =
  21. 21.78 + 89 + 85 + 78 =
  22. 22.86 + 67 + 62 + 59 =
  23. 23.20 + 75 + 67 + 12 =
  24. 24.63 + 76 + 71 + 87 =
  25. 25.36 + 29 + 77 + 68 =
  26. 26.88 + 55 + 47 + 81 =
  27. 27.79 + 68 + 82 + 77 =
  28. 28.50 + 31 + 31 + 14 =
  29. 29.31 + 59 + 45 + 12 =
  30. 30.60 + 41 + 89 + 28 =
  31. 31.26 + 11 + 44 + 84 =
  32. 32.50 + 24 + 85 + 66 =
  33. 33.61 + 55 + 62 + 37 =
  34. 34.64 + 55 + 76 + 58 =
  35. 35.49 + 62 + 38 + 23 =
  36. 36.26 + 74 + 13 + 34 =
  37. 37.77 + 14 + 62 + 81 =
  38. 38.19 + 19 + 68 + 14 =
  39. 39.83 + 22 + 88 + 37 =
  40. 40.27 + 74 + 86 + 23 =

Answer key

  1. 205
  2. 139
  3. 259
  4. 128
  5. 219
  6. 181
  7. 218
  8. 209
  9. 134
  10. 290
  11. 193
  12. 187
  13. 227
  14. 196
  15. 163
  16. 197
  17. 235
  18. 163
  19. 184
  20. 144
  21. 330
  22. 274
  23. 174
  24. 297
  25. 210
  26. 271
  27. 306
  28. 126
  29. 147
  30. 218
  31. 165
  32. 225
  33. 215
  34. 253
  35. 172
  36. 147
  37. 234
  38. 120
  39. 230
  40. 210

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