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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 665 · 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. 1.84 + 65 + 51 + 76 =
  2. 2.47 + 33 + 64 + 68 =
  3. 3.27 + 64 + 79 + 83 =
  4. 4.13 + 46 + 58 + 46 =
  5. 5.74 + 78 + 59 + 37 =
  6. 6.76 + 49 + 60 + 16 =
  7. 7.31 + 70 + 58 + 15 =
  8. 8.39 + 68 + 42 + 56 =
  9. 9.73 + 65 + 82 + 23 =
  10. 10.87 + 47 + 14 + 34 =
  11. 11.81 + 38 + 33 + 31 =
  12. 12.85 + 32 + 86 + 13 =
  13. 13.31 + 44 + 86 + 50 =
  14. 14.69 + 68 + 33 + 36 =
  15. 15.78 + 11 + 74 + 57 =
  16. 16.73 + 50 + 34 + 13 =
  17. 17.17 + 36 + 60 + 38 =
  18. 18.46 + 55 + 13 + 62 =
  19. 19.16 + 60 + 21 + 23 =
  20. 20.23 + 72 + 87 + 79 =
  21. 21.85 + 37 + 51 + 43 =
  22. 22.64 + 87 + 76 + 50 =
  23. 23.69 + 74 + 59 + 85 =
  24. 24.69 + 68 + 38 + 47 =
  25. 25.88 + 12 + 56 + 67 =
  26. 26.69 + 63 + 68 + 45 =
  27. 27.50 + 57 + 49 + 45 =
  28. 28.29 + 42 + 53 + 38 =
  29. 29.32 + 78 + 74 + 20 =
  30. 30.25 + 62 + 20 + 83 =
  31. 31.83 + 76 + 87 + 77 =
  32. 32.30 + 80 + 56 + 14 =
  33. 33.46 + 24 + 28 + 25 =
  34. 34.53 + 47 + 14 + 68 =
  35. 35.89 + 41 + 36 + 22 =
  36. 36.13 + 20 + 52 + 41 =
  37. 37.52 + 30 + 58 + 44 =
  38. 38.37 + 71 + 55 + 56 =
  39. 39.68 + 31 + 20 + 80 =
  40. 40.78 + 43 + 26 + 12 =

Answer key

  1. 276
  2. 212
  3. 253
  4. 163
  5. 248
  6. 201
  7. 174
  8. 205
  9. 243
  10. 182
  11. 183
  12. 216
  13. 211
  14. 206
  15. 220
  16. 170
  17. 151
  18. 176
  19. 120
  20. 261
  21. 216
  22. 277
  23. 287
  24. 222
  25. 223
  26. 245
  27. 201
  28. 162
  29. 204
  30. 190
  31. 323
  32. 180
  33. 123
  34. 182
  35. 188
  36. 126
  37. 184
  38. 219
  39. 199
  40. 159

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