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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 366 · 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. 1.20 + 85 + 43 + 70 =
  2. 2.20 + 54 + 62 + 78 =
  3. 3.19 + 74 + 62 + 80 =
  4. 4.74 + 17 + 16 + 12 =
  5. 5.32 + 18 + 21 + 19 =
  6. 6.19 + 80 + 69 + 13 =
  7. 7.24 + 34 + 42 + 87 =
  8. 8.76 + 80 + 25 + 82 =
  9. 9.31 + 26 + 20 + 31 =
  10. 10.87 + 40 + 46 + 30 =
  11. 11.13 + 42 + 49 + 16 =
  12. 12.77 + 22 + 74 + 66 =
  13. 13.69 + 74 + 38 + 82 =
  14. 14.66 + 72 + 65 + 15 =
  15. 15.41 + 41 + 28 + 77 =
  16. 16.74 + 49 + 74 + 19 =
  17. 17.15 + 40 + 47 + 70 =
  18. 18.40 + 87 + 14 + 42 =
  19. 19.68 + 88 + 24 + 15 =
  20. 20.55 + 66 + 54 + 55 =
  21. 21.35 + 24 + 77 + 81 =
  22. 22.16 + 56 + 50 + 51 =
  23. 23.55 + 66 + 29 + 22 =
  24. 24.56 + 11 + 35 + 71 =
  25. 25.11 + 60 + 81 + 70 =
  26. 26.12 + 70 + 82 + 47 =
  27. 27.77 + 17 + 26 + 16 =
  28. 28.46 + 27 + 82 + 31 =
  29. 29.48 + 26 + 54 + 29 =
  30. 30.28 + 87 + 54 + 25 =
  31. 31.50 + 53 + 75 + 75 =
  32. 32.39 + 25 + 26 + 82 =
  33. 33.84 + 89 + 59 + 50 =
  34. 34.13 + 14 + 16 + 69 =
  35. 35.28 + 51 + 75 + 13 =
  36. 36.24 + 22 + 60 + 30 =
  37. 37.11 + 73 + 48 + 52 =
  38. 38.87 + 29 + 67 + 88 =
  39. 39.40 + 22 + 73 + 11 =
  40. 40.39 + 30 + 17 + 79 =

Answer key

  1. 218
  2. 214
  3. 235
  4. 119
  5. 90
  6. 181
  7. 187
  8. 263
  9. 108
  10. 203
  11. 120
  12. 239
  13. 263
  14. 218
  15. 187
  16. 216
  17. 172
  18. 183
  19. 195
  20. 230
  21. 217
  22. 173
  23. 172
  24. 173
  25. 222
  26. 211
  27. 136
  28. 186
  29. 157
  30. 194
  31. 253
  32. 172
  33. 282
  34. 112
  35. 167
  36. 136
  37. 184
  38. 271
  39. 146
  40. 165

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