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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 563 · 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 + 75 + 63 + 12 =
  2. 2.60 + 39 + 66 + 75 =
  3. 3.32 + 74 + 86 + 78 =
  4. 4.26 + 78 + 23 + 29 =
  5. 5.54 + 88 + 85 + 45 =
  6. 6.18 + 70 + 20 + 41 =
  7. 7.49 + 38 + 88 + 58 =
  8. 8.70 + 63 + 63 + 18 =
  9. 9.32 + 42 + 72 + 27 =
  10. 10.29 + 44 + 41 + 22 =
  11. 11.31 + 85 + 55 + 13 =
  12. 12.29 + 29 + 43 + 25 =
  13. 13.21 + 39 + 43 + 23 =
  14. 14.62 + 48 + 58 + 83 =
  15. 15.58 + 41 + 14 + 20 =
  16. 16.16 + 62 + 44 + 57 =
  17. 17.29 + 31 + 24 + 85 =
  18. 18.29 + 22 + 69 + 11 =
  19. 19.43 + 11 + 44 + 81 =
  20. 20.81 + 80 + 18 + 59 =
  21. 21.28 + 70 + 44 + 73 =
  22. 22.62 + 14 + 38 + 14 =
  23. 23.61 + 35 + 57 + 57 =
  24. 24.33 + 13 + 23 + 67 =
  25. 25.79 + 75 + 33 + 33 =
  26. 26.69 + 44 + 25 + 34 =
  27. 27.76 + 80 + 44 + 21 =
  28. 28.47 + 37 + 60 + 12 =
  29. 29.87 + 82 + 44 + 59 =
  30. 30.37 + 61 + 28 + 24 =
  31. 31.57 + 20 + 53 + 34 =
  32. 32.51 + 24 + 69 + 87 =
  33. 33.12 + 48 + 22 + 35 =
  34. 34.17 + 80 + 40 + 37 =
  35. 35.23 + 60 + 27 + 69 =
  36. 36.52 + 73 + 44 + 69 =
  37. 37.56 + 23 + 60 + 54 =
  38. 38.89 + 71 + 87 + 64 =
  39. 39.65 + 63 + 57 + 62 =
  40. 40.27 + 31 + 63 + 61 =

Answer key

  1. 230
  2. 240
  3. 270
  4. 156
  5. 272
  6. 149
  7. 233
  8. 214
  9. 173
  10. 136
  11. 184
  12. 126
  13. 126
  14. 251
  15. 133
  16. 179
  17. 169
  18. 131
  19. 179
  20. 238
  21. 215
  22. 128
  23. 210
  24. 136
  25. 220
  26. 172
  27. 221
  28. 156
  29. 272
  30. 150
  31. 164
  32. 231
  33. 117
  34. 174
  35. 179
  36. 238
  37. 193
  38. 311
  39. 247
  40. 182

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