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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 359 · 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 + 84 + 81 + 46 =
  2. 2.14 + 71 + 69 + 61 =
  3. 3.15 + 24 + 85 + 41 =
  4. 4.65 + 71 + 66 + 43 =
  5. 5.18 + 55 + 13 + 58 =
  6. 6.42 + 19 + 15 + 82 =
  7. 7.40 + 51 + 52 + 12 =
  8. 8.76 + 44 + 61 + 31 =
  9. 9.67 + 28 + 40 + 56 =
  10. 10.23 + 48 + 14 + 84 =
  11. 11.36 + 24 + 46 + 13 =
  12. 12.19 + 48 + 37 + 61 =
  13. 13.38 + 76 + 75 + 14 =
  14. 14.40 + 11 + 17 + 19 =
  15. 15.53 + 36 + 53 + 66 =
  16. 16.79 + 72 + 47 + 34 =
  17. 17.74 + 78 + 85 + 54 =
  18. 18.67 + 69 + 29 + 68 =
  19. 19.25 + 31 + 50 + 69 =
  20. 20.46 + 56 + 14 + 18 =
  21. 21.40 + 61 + 51 + 40 =
  22. 22.86 + 73 + 23 + 59 =
  23. 23.67 + 27 + 51 + 58 =
  24. 24.77 + 52 + 78 + 54 =
  25. 25.80 + 42 + 31 + 20 =
  26. 26.17 + 26 + 46 + 51 =
  27. 27.20 + 31 + 21 + 25 =
  28. 28.18 + 43 + 71 + 44 =
  29. 29.82 + 86 + 22 + 31 =
  30. 30.38 + 48 + 46 + 16 =
  31. 31.63 + 12 + 35 + 32 =
  32. 32.25 + 12 + 13 + 34 =
  33. 33.78 + 88 + 31 + 40 =
  34. 34.82 + 38 + 78 + 43 =
  35. 35.41 + 36 + 22 + 73 =
  36. 36.89 + 21 + 28 + 89 =
  37. 37.47 + 75 + 29 + 41 =
  38. 38.48 + 53 + 71 + 74 =
  39. 39.85 + 56 + 47 + 57 =
  40. 40.28 + 88 + 59 + 75 =

Answer key

  1. 231
  2. 215
  3. 165
  4. 245
  5. 144
  6. 158
  7. 155
  8. 212
  9. 191
  10. 169
  11. 119
  12. 165
  13. 203
  14. 87
  15. 208
  16. 232
  17. 291
  18. 233
  19. 175
  20. 134
  21. 192
  22. 241
  23. 203
  24. 261
  25. 173
  26. 140
  27. 97
  28. 176
  29. 221
  30. 148
  31. 142
  32. 84
  33. 237
  34. 241
  35. 172
  36. 227
  37. 192
  38. 246
  39. 245
  40. 250

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