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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 262 · 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. 1.37 + 20 + 20 + 67 =
  2. 2.86 + 34 + 77 + 67 =
  3. 3.86 + 59 + 79 + 69 =
  4. 4.84 + 38 + 65 + 43 =
  5. 5.84 + 41 + 40 + 52 =
  6. 6.14 + 45 + 79 + 89 =
  7. 7.29 + 74 + 40 + 85 =
  8. 8.74 + 14 + 84 + 44 =
  9. 9.84 + 89 + 50 + 39 =
  10. 10.47 + 21 + 29 + 67 =
  11. 11.35 + 45 + 30 + 20 =
  12. 12.39 + 30 + 75 + 19 =
  13. 13.30 + 49 + 86 + 44 =
  14. 14.24 + 14 + 65 + 36 =
  15. 15.33 + 39 + 18 + 17 =
  16. 16.78 + 28 + 42 + 33 =
  17. 17.41 + 42 + 67 + 88 =
  18. 18.42 + 28 + 13 + 72 =
  19. 19.61 + 20 + 23 + 72 =
  20. 20.85 + 72 + 11 + 85 =
  21. 21.45 + 55 + 28 + 28 =
  22. 22.51 + 34 + 33 + 60 =
  23. 23.12 + 23 + 54 + 46 =
  24. 24.48 + 75 + 12 + 21 =
  25. 25.21 + 50 + 34 + 57 =
  26. 26.81 + 66 + 74 + 15 =
  27. 27.56 + 25 + 77 + 84 =
  28. 28.47 + 43 + 60 + 26 =
  29. 29.29 + 26 + 74 + 62 =
  30. 30.84 + 36 + 81 + 46 =
  31. 31.56 + 70 + 26 + 40 =
  32. 32.51 + 57 + 56 + 75 =
  33. 33.53 + 75 + 71 + 82 =
  34. 34.70 + 69 + 48 + 35 =
  35. 35.61 + 40 + 84 + 85 =
  36. 36.32 + 25 + 88 + 80 =
  37. 37.25 + 62 + 28 + 21 =
  38. 38.59 + 40 + 86 + 42 =
  39. 39.40 + 20 + 57 + 13 =
  40. 40.81 + 80 + 16 + 37 =

Answer key

  1. 144
  2. 264
  3. 293
  4. 230
  5. 217
  6. 227
  7. 228
  8. 216
  9. 262
  10. 164
  11. 130
  12. 163
  13. 209
  14. 139
  15. 107
  16. 181
  17. 238
  18. 155
  19. 176
  20. 253
  21. 156
  22. 178
  23. 135
  24. 156
  25. 162
  26. 236
  27. 242
  28. 176
  29. 191
  30. 247
  31. 192
  32. 239
  33. 281
  34. 222
  35. 270
  36. 225
  37. 136
  38. 227
  39. 130
  40. 214

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