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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 657 · 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 + 75 + 45 + 14 =
  2. 2.60 + 40 + 69 + 64 =
  3. 3.28 + 13 + 65 + 44 =
  4. 4.58 + 71 + 79 + 27 =
  5. 5.30 + 30 + 17 + 74 =
  6. 6.21 + 84 + 75 + 80 =
  7. 7.82 + 54 + 19 + 44 =
  8. 8.69 + 48 + 37 + 83 =
  9. 9.53 + 34 + 78 + 42 =
  10. 10.18 + 67 + 19 + 78 =
  11. 11.32 + 38 + 68 + 33 =
  12. 12.79 + 46 + 37 + 55 =
  13. 13.29 + 66 + 51 + 24 =
  14. 14.50 + 52 + 30 + 26 =
  15. 15.32 + 43 + 20 + 35 =
  16. 16.19 + 16 + 87 + 42 =
  17. 17.86 + 46 + 17 + 42 =
  18. 18.47 + 40 + 43 + 89 =
  19. 19.55 + 16 + 69 + 51 =
  20. 20.52 + 49 + 15 + 57 =
  21. 21.61 + 57 + 50 + 79 =
  22. 22.20 + 22 + 67 + 71 =
  23. 23.85 + 55 + 35 + 61 =
  24. 24.30 + 21 + 34 + 56 =
  25. 25.62 + 65 + 56 + 15 =
  26. 26.11 + 84 + 35 + 75 =
  27. 27.25 + 33 + 11 + 62 =
  28. 28.85 + 24 + 52 + 28 =
  29. 29.60 + 31 + 21 + 17 =
  30. 30.54 + 16 + 66 + 22 =
  31. 31.61 + 13 + 53 + 26 =
  32. 32.89 + 88 + 15 + 66 =
  33. 33.63 + 73 + 74 + 61 =
  34. 34.24 + 75 + 67 + 21 =
  35. 35.75 + 33 + 52 + 78 =
  36. 36.45 + 12 + 54 + 29 =
  37. 37.48 + 63 + 11 + 24 =
  38. 38.33 + 30 + 43 + 20 =
  39. 39.38 + 63 + 52 + 38 =
  40. 40.37 + 12 + 57 + 37 =

Answer key

  1. 204
  2. 233
  3. 150
  4. 235
  5. 151
  6. 260
  7. 199
  8. 237
  9. 207
  10. 182
  11. 171
  12. 217
  13. 170
  14. 158
  15. 130
  16. 164
  17. 191
  18. 219
  19. 191
  20. 173
  21. 247
  22. 180
  23. 236
  24. 141
  25. 198
  26. 205
  27. 131
  28. 189
  29. 129
  30. 158
  31. 153
  32. 258
  33. 271
  34. 187
  35. 238
  36. 140
  37. 146
  38. 126
  39. 191
  40. 143

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