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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 427 · 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. 1.54 + 50 + 81 + 66 =
  2. 2.16 + 77 + 79 + 11 =
  3. 3.13 + 76 + 88 + 62 =
  4. 4.37 + 60 + 87 + 61 =
  5. 5.39 + 50 + 53 + 43 =
  6. 6.83 + 36 + 22 + 67 =
  7. 7.40 + 56 + 45 + 84 =
  8. 8.59 + 48 + 26 + 64 =
  9. 9.70 + 38 + 33 + 37 =
  10. 10.47 + 20 + 11 + 65 =
  11. 11.49 + 49 + 66 + 24 =
  12. 12.74 + 17 + 85 + 51 =
  13. 13.69 + 52 + 46 + 40 =
  14. 14.80 + 69 + 47 + 58 =
  15. 15.71 + 39 + 55 + 71 =
  16. 16.22 + 24 + 57 + 26 =
  17. 17.54 + 42 + 86 + 67 =
  18. 18.43 + 47 + 71 + 58 =
  19. 19.54 + 53 + 33 + 44 =
  20. 20.48 + 18 + 14 + 33 =
  21. 21.38 + 69 + 44 + 88 =
  22. 22.51 + 66 + 29 + 20 =
  23. 23.62 + 18 + 87 + 50 =
  24. 24.80 + 31 + 78 + 65 =
  25. 25.37 + 43 + 16 + 72 =
  26. 26.84 + 29 + 25 + 74 =
  27. 27.29 + 77 + 49 + 72 =
  28. 28.52 + 14 + 38 + 48 =
  29. 29.16 + 78 + 70 + 42 =
  30. 30.33 + 36 + 11 + 28 =
  31. 31.45 + 60 + 55 + 41 =
  32. 32.25 + 50 + 58 + 74 =
  33. 33.37 + 29 + 58 + 19 =
  34. 34.56 + 15 + 85 + 55 =
  35. 35.20 + 49 + 41 + 23 =
  36. 36.21 + 62 + 72 + 24 =
  37. 37.29 + 77 + 72 + 22 =
  38. 38.31 + 18 + 20 + 38 =
  39. 39.47 + 48 + 12 + 71 =
  40. 40.42 + 68 + 43 + 57 =

Answer key

  1. 251
  2. 183
  3. 239
  4. 245
  5. 185
  6. 208
  7. 225
  8. 197
  9. 178
  10. 143
  11. 188
  12. 227
  13. 207
  14. 254
  15. 236
  16. 129
  17. 249
  18. 219
  19. 184
  20. 113
  21. 239
  22. 166
  23. 217
  24. 254
  25. 168
  26. 212
  27. 227
  28. 152
  29. 206
  30. 108
  31. 201
  32. 207
  33. 143
  34. 211
  35. 133
  36. 179
  37. 200
  38. 107
  39. 178
  40. 210

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