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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 176 · 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. 1.80 + 43 + 43 + 85 =
  2. 2.32 + 47 + 86 + 23 =
  3. 3.15 + 77 + 59 + 41 =
  4. 4.35 + 54 + 66 + 46 =
  5. 5.34 + 63 + 50 + 83 =
  6. 6.89 + 78 + 66 + 49 =
  7. 7.40 + 89 + 81 + 30 =
  8. 8.56 + 31 + 75 + 30 =
  9. 9.71 + 29 + 71 + 79 =
  10. 10.38 + 26 + 13 + 22 =
  11. 11.28 + 72 + 25 + 55 =
  12. 12.49 + 71 + 71 + 66 =
  13. 13.21 + 82 + 11 + 76 =
  14. 14.69 + 19 + 59 + 17 =
  15. 15.27 + 59 + 12 + 25 =
  16. 16.50 + 37 + 16 + 34 =
  17. 17.47 + 35 + 26 + 12 =
  18. 18.54 + 19 + 23 + 32 =
  19. 19.58 + 74 + 26 + 49 =
  20. 20.56 + 82 + 50 + 67 =
  21. 21.33 + 18 + 29 + 71 =
  22. 22.58 + 65 + 81 + 64 =
  23. 23.66 + 34 + 57 + 53 =
  24. 24.34 + 20 + 11 + 68 =
  25. 25.41 + 71 + 44 + 62 =
  26. 26.18 + 34 + 16 + 58 =
  27. 27.11 + 83 + 38 + 60 =
  28. 28.54 + 67 + 37 + 58 =
  29. 29.73 + 81 + 38 + 48 =
  30. 30.62 + 11 + 26 + 48 =
  31. 31.11 + 28 + 48 + 80 =
  32. 32.81 + 57 + 43 + 78 =
  33. 33.48 + 74 + 28 + 87 =
  34. 34.66 + 70 + 16 + 51 =
  35. 35.53 + 76 + 24 + 47 =
  36. 36.28 + 72 + 27 + 44 =
  37. 37.32 + 62 + 14 + 29 =
  38. 38.39 + 11 + 51 + 34 =
  39. 39.17 + 33 + 19 + 68 =
  40. 40.43 + 80 + 16 + 23 =

Answer key

  1. 251
  2. 188
  3. 192
  4. 201
  5. 230
  6. 282
  7. 240
  8. 192
  9. 250
  10. 99
  11. 180
  12. 257
  13. 190
  14. 164
  15. 123
  16. 137
  17. 120
  18. 128
  19. 207
  20. 255
  21. 151
  22. 268
  23. 210
  24. 133
  25. 218
  26. 126
  27. 192
  28. 216
  29. 240
  30. 147
  31. 167
  32. 259
  33. 237
  34. 203
  35. 200
  36. 171
  37. 137
  38. 135
  39. 137
  40. 162

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