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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 407 · 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. 1.60 + 68 + 65 + 55 =
  2. 2.13 + 13 + 37 + 33 =
  3. 3.60 + 72 + 44 + 44 =
  4. 4.84 + 52 + 13 + 76 =
  5. 5.18 + 22 + 62 + 74 =
  6. 6.33 + 43 + 25 + 37 =
  7. 7.71 + 17 + 71 + 72 =
  8. 8.80 + 57 + 57 + 17 =
  9. 9.61 + 62 + 25 + 84 =
  10. 10.72 + 23 + 37 + 31 =
  11. 11.32 + 34 + 25 + 64 =
  12. 12.56 + 31 + 78 + 69 =
  13. 13.51 + 70 + 29 + 73 =
  14. 14.31 + 12 + 19 + 31 =
  15. 15.53 + 68 + 12 + 82 =
  16. 16.41 + 57 + 76 + 34 =
  17. 17.18 + 89 + 58 + 34 =
  18. 18.64 + 69 + 31 + 20 =
  19. 19.32 + 77 + 41 + 11 =
  20. 20.11 + 33 + 50 + 27 =
  21. 21.65 + 81 + 52 + 72 =
  22. 22.66 + 83 + 45 + 31 =
  23. 23.76 + 42 + 41 + 79 =
  24. 24.12 + 31 + 57 + 15 =
  25. 25.38 + 26 + 61 + 21 =
  26. 26.27 + 26 + 81 + 53 =
  27. 27.31 + 24 + 74 + 63 =
  28. 28.13 + 89 + 81 + 67 =
  29. 29.74 + 58 + 53 + 33 =
  30. 30.48 + 59 + 73 + 82 =
  31. 31.82 + 46 + 70 + 18 =
  32. 32.50 + 27 + 17 + 29 =
  33. 33.37 + 26 + 83 + 88 =
  34. 34.32 + 38 + 59 + 85 =
  35. 35.79 + 74 + 48 + 26 =
  36. 36.50 + 20 + 65 + 75 =
  37. 37.41 + 26 + 47 + 20 =
  38. 38.76 + 27 + 89 + 30 =
  39. 39.27 + 25 + 87 + 87 =
  40. 40.52 + 54 + 47 + 27 =

Answer key

  1. 248
  2. 96
  3. 220
  4. 225
  5. 176
  6. 138
  7. 231
  8. 211
  9. 232
  10. 163
  11. 155
  12. 234
  13. 223
  14. 93
  15. 215
  16. 208
  17. 199
  18. 184
  19. 161
  20. 121
  21. 270
  22. 225
  23. 238
  24. 115
  25. 146
  26. 187
  27. 192
  28. 250
  29. 218
  30. 262
  31. 216
  32. 123
  33. 234
  34. 214
  35. 227
  36. 210
  37. 134
  38. 222
  39. 226
  40. 180

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