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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 507 · 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. 1.79 + 60 + 33 + 89 =
  2. 2.64 + 20 + 82 + 25 =
  3. 3.14 + 21 + 25 + 28 =
  4. 4.69 + 67 + 54 + 66 =
  5. 5.86 + 84 + 44 + 63 =
  6. 6.37 + 50 + 11 + 21 =
  7. 7.59 + 66 + 54 + 65 =
  8. 8.55 + 46 + 83 + 39 =
  9. 9.16 + 62 + 14 + 31 =
  10. 10.43 + 59 + 60 + 81 =
  11. 11.21 + 50 + 68 + 53 =
  12. 12.13 + 26 + 39 + 32 =
  13. 13.47 + 76 + 56 + 27 =
  14. 14.22 + 68 + 22 + 43 =
  15. 15.20 + 44 + 66 + 65 =
  16. 16.27 + 78 + 11 + 71 =
  17. 17.54 + 53 + 86 + 45 =
  18. 18.29 + 37 + 50 + 23 =
  19. 19.75 + 72 + 11 + 74 =
  20. 20.74 + 21 + 51 + 56 =
  21. 21.18 + 17 + 28 + 29 =
  22. 22.64 + 73 + 13 + 37 =
  23. 23.81 + 16 + 89 + 19 =
  24. 24.39 + 53 + 70 + 35 =
  25. 25.66 + 79 + 42 + 65 =
  26. 26.52 + 85 + 30 + 31 =
  27. 27.29 + 46 + 35 + 34 =
  28. 28.23 + 77 + 25 + 21 =
  29. 29.77 + 40 + 33 + 82 =
  30. 30.36 + 84 + 12 + 60 =
  31. 31.55 + 80 + 58 + 56 =
  32. 32.70 + 48 + 43 + 74 =
  33. 33.60 + 13 + 13 + 43 =
  34. 34.27 + 56 + 44 + 32 =
  35. 35.33 + 29 + 13 + 44 =
  36. 36.81 + 89 + 67 + 77 =
  37. 37.27 + 19 + 53 + 18 =
  38. 38.71 + 67 + 47 + 51 =
  39. 39.48 + 59 + 48 + 65 =
  40. 40.36 + 17 + 19 + 19 =

Answer key

  1. 261
  2. 191
  3. 88
  4. 256
  5. 277
  6. 119
  7. 244
  8. 223
  9. 123
  10. 243
  11. 192
  12. 110
  13. 206
  14. 155
  15. 195
  16. 187
  17. 238
  18. 139
  19. 232
  20. 202
  21. 92
  22. 187
  23. 205
  24. 197
  25. 252
  26. 198
  27. 144
  28. 146
  29. 232
  30. 192
  31. 249
  32. 235
  33. 129
  34. 159
  35. 119
  36. 314
  37. 117
  38. 236
  39. 220
  40. 91

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