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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 263 · 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 + 49 + 35 + 38 =
  2. 2.21 + 19 + 83 + 16 =
  3. 3.39 + 53 + 18 + 53 =
  4. 4.80 + 28 + 39 + 78 =
  5. 5.31 + 42 + 78 + 54 =
  6. 6.54 + 43 + 36 + 41 =
  7. 7.89 + 25 + 33 + 26 =
  8. 8.44 + 32 + 75 + 44 =
  9. 9.72 + 79 + 58 + 86 =
  10. 10.23 + 74 + 52 + 27 =
  11. 11.70 + 36 + 58 + 52 =
  12. 12.14 + 35 + 16 + 58 =
  13. 13.13 + 27 + 66 + 51 =
  14. 14.88 + 88 + 67 + 17 =
  15. 15.74 + 15 + 45 + 53 =
  16. 16.30 + 30 + 35 + 15 =
  17. 17.40 + 28 + 84 + 56 =
  18. 18.68 + 18 + 43 + 23 =
  19. 19.39 + 63 + 80 + 65 =
  20. 20.17 + 65 + 48 + 28 =
  21. 21.29 + 39 + 40 + 28 =
  22. 22.53 + 76 + 28 + 88 =
  23. 23.59 + 22 + 57 + 78 =
  24. 24.33 + 64 + 66 + 32 =
  25. 25.66 + 56 + 80 + 27 =
  26. 26.52 + 68 + 26 + 71 =
  27. 27.41 + 53 + 15 + 14 =
  28. 28.30 + 82 + 60 + 67 =
  29. 29.85 + 24 + 28 + 42 =
  30. 30.16 + 26 + 29 + 24 =
  31. 31.16 + 45 + 20 + 53 =
  32. 32.24 + 62 + 51 + 51 =
  33. 33.16 + 74 + 42 + 38 =
  34. 34.71 + 73 + 82 + 42 =
  35. 35.11 + 39 + 64 + 17 =
  36. 36.52 + 75 + 55 + 87 =
  37. 37.51 + 47 + 33 + 82 =
  38. 38.51 + 49 + 83 + 30 =
  39. 39.49 + 35 + 70 + 71 =
  40. 40.16 + 65 + 50 + 37 =

Answer key

  1. 185
  2. 139
  3. 163
  4. 225
  5. 205
  6. 174
  7. 173
  8. 195
  9. 295
  10. 176
  11. 216
  12. 123
  13. 157
  14. 260
  15. 187
  16. 110
  17. 208
  18. 152
  19. 247
  20. 158
  21. 136
  22. 245
  23. 216
  24. 195
  25. 229
  26. 217
  27. 123
  28. 239
  29. 179
  30. 95
  31. 134
  32. 188
  33. 170
  34. 268
  35. 131
  36. 269
  37. 213
  38. 213
  39. 225
  40. 168

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