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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 145 · 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. 1.63 + 21 + 39 + 59 =
  2. 2.52 + 71 + 22 + 62 =
  3. 3.17 + 27 + 26 + 40 =
  4. 4.69 + 80 + 78 + 27 =
  5. 5.69 + 81 + 15 + 85 =
  6. 6.63 + 80 + 76 + 51 =
  7. 7.28 + 85 + 77 + 81 =
  8. 8.47 + 61 + 36 + 59 =
  9. 9.32 + 55 + 81 + 15 =
  10. 10.36 + 63 + 23 + 18 =
  11. 11.57 + 58 + 33 + 30 =
  12. 12.78 + 51 + 34 + 50 =
  13. 13.21 + 36 + 20 + 82 =
  14. 14.45 + 12 + 82 + 32 =
  15. 15.26 + 12 + 17 + 51 =
  16. 16.87 + 75 + 14 + 75 =
  17. 17.37 + 46 + 73 + 17 =
  18. 18.22 + 74 + 45 + 77 =
  19. 19.48 + 12 + 36 + 73 =
  20. 20.36 + 44 + 12 + 38 =
  21. 21.39 + 61 + 87 + 52 =
  22. 22.34 + 59 + 32 + 81 =
  23. 23.39 + 31 + 89 + 70 =
  24. 24.75 + 74 + 68 + 83 =
  25. 25.15 + 15 + 30 + 43 =
  26. 26.43 + 44 + 56 + 51 =
  27. 27.42 + 86 + 15 + 34 =
  28. 28.64 + 40 + 25 + 39 =
  29. 29.31 + 60 + 52 + 51 =
  30. 30.29 + 56 + 11 + 67 =
  31. 31.26 + 23 + 22 + 73 =
  32. 32.15 + 54 + 36 + 41 =
  33. 33.45 + 24 + 28 + 42 =
  34. 34.61 + 68 + 68 + 34 =
  35. 35.49 + 81 + 30 + 49 =
  36. 36.61 + 63 + 17 + 14 =
  37. 37.41 + 73 + 74 + 80 =
  38. 38.72 + 79 + 48 + 35 =
  39. 39.77 + 24 + 58 + 75 =
  40. 40.59 + 38 + 22 + 62 =

Answer key

  1. 182
  2. 207
  3. 110
  4. 254
  5. 250
  6. 270
  7. 271
  8. 203
  9. 183
  10. 140
  11. 178
  12. 213
  13. 159
  14. 171
  15. 106
  16. 251
  17. 173
  18. 218
  19. 169
  20. 130
  21. 239
  22. 206
  23. 229
  24. 300
  25. 103
  26. 194
  27. 177
  28. 168
  29. 194
  30. 163
  31. 144
  32. 146
  33. 139
  34. 231
  35. 209
  36. 155
  37. 268
  38. 234
  39. 234
  40. 181

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