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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 515 · 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. 1.80 + 23 + 42 + 58 =
  2. 2.54 + 33 + 38 + 22 =
  3. 3.72 + 55 + 33 + 80 =
  4. 4.85 + 78 + 56 + 21 =
  5. 5.36 + 71 + 51 + 17 =
  6. 6.22 + 87 + 58 + 62 =
  7. 7.44 + 17 + 65 + 16 =
  8. 8.15 + 88 + 60 + 42 =
  9. 9.19 + 21 + 15 + 73 =
  10. 10.32 + 11 + 22 + 85 =
  11. 11.60 + 78 + 12 + 88 =
  12. 12.56 + 40 + 55 + 12 =
  13. 13.88 + 48 + 56 + 82 =
  14. 14.83 + 44 + 24 + 73 =
  15. 15.29 + 88 + 27 + 68 =
  16. 16.25 + 20 + 68 + 81 =
  17. 17.34 + 61 + 74 + 33 =
  18. 18.46 + 30 + 16 + 12 =
  19. 19.74 + 64 + 89 + 24 =
  20. 20.25 + 11 + 73 + 76 =
  21. 21.34 + 12 + 20 + 26 =
  22. 22.42 + 67 + 34 + 55 =
  23. 23.25 + 59 + 73 + 15 =
  24. 24.46 + 54 + 26 + 86 =
  25. 25.26 + 83 + 60 + 57 =
  26. 26.78 + 33 + 44 + 12 =
  27. 27.17 + 14 + 34 + 56 =
  28. 28.60 + 73 + 82 + 78 =
  29. 29.86 + 19 + 65 + 63 =
  30. 30.18 + 89 + 34 + 83 =
  31. 31.70 + 36 + 30 + 68 =
  32. 32.38 + 70 + 22 + 45 =
  33. 33.81 + 26 + 66 + 20 =
  34. 34.70 + 11 + 49 + 44 =
  35. 35.26 + 55 + 60 + 39 =
  36. 36.47 + 56 + 53 + 43 =
  37. 37.72 + 25 + 33 + 56 =
  38. 38.73 + 20 + 20 + 34 =
  39. 39.15 + 22 + 18 + 85 =
  40. 40.86 + 57 + 55 + 82 =

Answer key

  1. 203
  2. 147
  3. 240
  4. 240
  5. 175
  6. 229
  7. 142
  8. 205
  9. 128
  10. 150
  11. 238
  12. 163
  13. 274
  14. 224
  15. 212
  16. 194
  17. 202
  18. 104
  19. 251
  20. 185
  21. 92
  22. 198
  23. 172
  24. 212
  25. 226
  26. 167
  27. 121
  28. 293
  29. 233
  30. 224
  31. 204
  32. 175
  33. 193
  34. 174
  35. 180
  36. 199
  37. 186
  38. 147
  39. 140
  40. 280

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