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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 543 · 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. 1.38 + 59 + 83 + 15 =
  2. 2.39 + 81 + 11 + 61 =
  3. 3.41 + 61 + 28 + 57 =
  4. 4.70 + 15 + 18 + 80 =
  5. 5.23 + 55 + 25 + 87 =
  6. 6.51 + 19 + 69 + 46 =
  7. 7.74 + 58 + 19 + 30 =
  8. 8.84 + 11 + 50 + 14 =
  9. 9.20 + 40 + 73 + 59 =
  10. 10.25 + 62 + 82 + 37 =
  11. 11.79 + 26 + 41 + 63 =
  12. 12.42 + 41 + 51 + 68 =
  13. 13.71 + 13 + 68 + 68 =
  14. 14.82 + 28 + 79 + 34 =
  15. 15.34 + 71 + 44 + 42 =
  16. 16.61 + 25 + 56 + 49 =
  17. 17.57 + 38 + 55 + 16 =
  18. 18.64 + 61 + 23 + 18 =
  19. 19.64 + 13 + 53 + 41 =
  20. 20.68 + 84 + 41 + 82 =
  21. 21.17 + 83 + 28 + 81 =
  22. 22.29 + 88 + 38 + 30 =
  23. 23.28 + 79 + 87 + 74 =
  24. 24.42 + 48 + 42 + 60 =
  25. 25.31 + 48 + 29 + 36 =
  26. 26.11 + 88 + 40 + 43 =
  27. 27.65 + 47 + 33 + 42 =
  28. 28.14 + 50 + 25 + 42 =
  29. 29.72 + 79 + 15 + 88 =
  30. 30.27 + 42 + 34 + 17 =
  31. 31.27 + 31 + 46 + 58 =
  32. 32.29 + 81 + 46 + 33 =
  33. 33.26 + 42 + 49 + 71 =
  34. 34.11 + 15 + 56 + 18 =
  35. 35.67 + 61 + 29 + 30 =
  36. 36.35 + 22 + 88 + 35 =
  37. 37.83 + 86 + 18 + 58 =
  38. 38.47 + 58 + 24 + 11 =
  39. 39.13 + 20 + 25 + 47 =
  40. 40.72 + 84 + 31 + 48 =

Answer key

  1. 195
  2. 192
  3. 187
  4. 183
  5. 190
  6. 185
  7. 181
  8. 159
  9. 192
  10. 206
  11. 209
  12. 202
  13. 220
  14. 223
  15. 191
  16. 191
  17. 166
  18. 166
  19. 171
  20. 275
  21. 209
  22. 185
  23. 268
  24. 192
  25. 144
  26. 182
  27. 187
  28. 131
  29. 254
  30. 120
  31. 162
  32. 189
  33. 188
  34. 100
  35. 187
  36. 180
  37. 245
  38. 140
  39. 105
  40. 235

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