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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 333 · 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. 1.70 + 51 + 32 + 29 =
  2. 2.25 + 37 + 17 + 23 =
  3. 3.18 + 76 + 85 + 65 =
  4. 4.69 + 82 + 73 + 74 =
  5. 5.40 + 82 + 69 + 44 =
  6. 6.17 + 48 + 44 + 45 =
  7. 7.29 + 82 + 69 + 47 =
  8. 8.11 + 54 + 20 + 38 =
  9. 9.57 + 36 + 72 + 30 =
  10. 10.37 + 43 + 66 + 14 =
  11. 11.73 + 71 + 72 + 18 =
  12. 12.86 + 28 + 12 + 13 =
  13. 13.11 + 86 + 14 + 25 =
  14. 14.18 + 42 + 78 + 13 =
  15. 15.27 + 74 + 72 + 19 =
  16. 16.51 + 77 + 13 + 81 =
  17. 17.77 + 75 + 53 + 73 =
  18. 18.26 + 55 + 67 + 49 =
  19. 19.27 + 68 + 25 + 31 =
  20. 20.28 + 29 + 87 + 75 =
  21. 21.70 + 35 + 21 + 53 =
  22. 22.80 + 47 + 33 + 28 =
  23. 23.37 + 41 + 49 + 28 =
  24. 24.45 + 19 + 40 + 73 =
  25. 25.70 + 43 + 75 + 27 =
  26. 26.21 + 33 + 57 + 64 =
  27. 27.24 + 15 + 81 + 73 =
  28. 28.78 + 39 + 16 + 61 =
  29. 29.17 + 88 + 29 + 31 =
  30. 30.66 + 63 + 34 + 32 =
  31. 31.58 + 67 + 60 + 70 =
  32. 32.64 + 67 + 17 + 51 =
  33. 33.17 + 38 + 36 + 67 =
  34. 34.56 + 66 + 71 + 57 =
  35. 35.27 + 12 + 21 + 29 =
  36. 36.33 + 59 + 52 + 81 =
  37. 37.66 + 12 + 31 + 12 =
  38. 38.17 + 24 + 85 + 14 =
  39. 39.20 + 49 + 71 + 70 =
  40. 40.33 + 36 + 79 + 38 =

Answer key

  1. 182
  2. 102
  3. 244
  4. 298
  5. 235
  6. 154
  7. 227
  8. 123
  9. 195
  10. 160
  11. 234
  12. 139
  13. 136
  14. 151
  15. 192
  16. 222
  17. 278
  18. 197
  19. 151
  20. 219
  21. 179
  22. 188
  23. 155
  24. 177
  25. 215
  26. 175
  27. 193
  28. 194
  29. 165
  30. 195
  31. 255
  32. 199
  33. 158
  34. 250
  35. 89
  36. 225
  37. 121
  38. 140
  39. 210
  40. 186

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