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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 461 · 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. 1.32 + 18 + 50 + 65 =
  2. 2.53 + 62 + 31 + 88 =
  3. 3.11 + 68 + 73 + 65 =
  4. 4.56 + 65 + 32 + 42 =
  5. 5.62 + 50 + 30 + 31 =
  6. 6.46 + 74 + 21 + 41 =
  7. 7.39 + 39 + 64 + 71 =
  8. 8.54 + 29 + 11 + 26 =
  9. 9.78 + 25 + 28 + 76 =
  10. 10.38 + 25 + 73 + 76 =
  11. 11.64 + 79 + 61 + 70 =
  12. 12.79 + 30 + 63 + 66 =
  13. 13.66 + 35 + 78 + 45 =
  14. 14.62 + 20 + 20 + 24 =
  15. 15.16 + 43 + 53 + 60 =
  16. 16.46 + 32 + 29 + 26 =
  17. 17.30 + 62 + 74 + 42 =
  18. 18.41 + 38 + 59 + 41 =
  19. 19.56 + 58 + 56 + 34 =
  20. 20.46 + 11 + 44 + 25 =
  21. 21.84 + 30 + 30 + 42 =
  22. 22.34 + 64 + 84 + 65 =
  23. 23.80 + 53 + 26 + 79 =
  24. 24.41 + 73 + 89 + 31 =
  25. 25.65 + 18 + 16 + 64 =
  26. 26.64 + 16 + 12 + 82 =
  27. 27.88 + 87 + 11 + 59 =
  28. 28.54 + 58 + 74 + 82 =
  29. 29.14 + 82 + 73 + 14 =
  30. 30.48 + 57 + 51 + 49 =
  31. 31.23 + 28 + 51 + 42 =
  32. 32.29 + 74 + 41 + 32 =
  33. 33.38 + 33 + 79 + 64 =
  34. 34.83 + 82 + 37 + 54 =
  35. 35.71 + 44 + 32 + 42 =
  36. 36.33 + 58 + 23 + 76 =
  37. 37.60 + 77 + 65 + 64 =
  38. 38.39 + 78 + 39 + 25 =
  39. 39.42 + 23 + 51 + 24 =
  40. 40.63 + 29 + 71 + 36 =

Answer key

  1. 165
  2. 234
  3. 217
  4. 195
  5. 173
  6. 182
  7. 213
  8. 120
  9. 207
  10. 212
  11. 274
  12. 238
  13. 224
  14. 126
  15. 172
  16. 133
  17. 208
  18. 179
  19. 204
  20. 126
  21. 186
  22. 247
  23. 238
  24. 234
  25. 163
  26. 174
  27. 245
  28. 268
  29. 183
  30. 205
  31. 144
  32. 176
  33. 214
  34. 256
  35. 189
  36. 190
  37. 266
  38. 181
  39. 140
  40. 199

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