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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 611 · 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. 1.63 + 30 + 48 + 57 =
  2. 2.55 + 81 + 60 + 30 =
  3. 3.29 + 14 + 28 + 70 =
  4. 4.46 + 51 + 57 + 21 =
  5. 5.38 + 11 + 32 + 43 =
  6. 6.19 + 23 + 22 + 16 =
  7. 7.28 + 28 + 22 + 41 =
  8. 8.35 + 86 + 37 + 84 =
  9. 9.24 + 13 + 21 + 28 =
  10. 10.57 + 82 + 21 + 37 =
  11. 11.12 + 41 + 55 + 41 =
  12. 12.29 + 83 + 41 + 17 =
  13. 13.32 + 11 + 11 + 21 =
  14. 14.79 + 51 + 43 + 20 =
  15. 15.32 + 32 + 19 + 72 =
  16. 16.20 + 56 + 37 + 67 =
  17. 17.28 + 11 + 28 + 16 =
  18. 18.42 + 23 + 55 + 16 =
  19. 19.38 + 87 + 60 + 13 =
  20. 20.42 + 78 + 15 + 26 =
  21. 21.78 + 73 + 65 + 69 =
  22. 22.24 + 72 + 73 + 71 =
  23. 23.63 + 46 + 79 + 70 =
  24. 24.63 + 70 + 42 + 36 =
  25. 25.45 + 60 + 29 + 82 =
  26. 26.38 + 89 + 34 + 89 =
  27. 27.38 + 28 + 37 + 63 =
  28. 28.67 + 89 + 22 + 70 =
  29. 29.84 + 54 + 22 + 77 =
  30. 30.42 + 78 + 82 + 41 =
  31. 31.52 + 29 + 76 + 58 =
  32. 32.68 + 80 + 76 + 14 =
  33. 33.54 + 65 + 31 + 34 =
  34. 34.78 + 37 + 17 + 22 =
  35. 35.48 + 13 + 36 + 78 =
  36. 36.83 + 69 + 46 + 87 =
  37. 37.30 + 61 + 11 + 37 =
  38. 38.71 + 42 + 15 + 73 =
  39. 39.35 + 63 + 16 + 25 =
  40. 40.24 + 36 + 84 + 23 =

Answer key

  1. 198
  2. 226
  3. 141
  4. 175
  5. 124
  6. 80
  7. 119
  8. 242
  9. 86
  10. 197
  11. 149
  12. 170
  13. 75
  14. 193
  15. 155
  16. 180
  17. 83
  18. 136
  19. 198
  20. 161
  21. 285
  22. 240
  23. 258
  24. 211
  25. 216
  26. 250
  27. 166
  28. 248
  29. 237
  30. 243
  31. 215
  32. 238
  33. 184
  34. 154
  35. 175
  36. 285
  37. 139
  38. 201
  39. 139
  40. 167

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