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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 814 · 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. 1.12 + 28 + 17 + 28 =
  2. 2.35 + 74 + 21 + 48 =
  3. 3.67 + 67 + 33 + 87 =
  4. 4.76 + 28 + 42 + 15 =
  5. 5.85 + 72 + 12 + 71 =
  6. 6.24 + 47 + 82 + 14 =
  7. 7.17 + 12 + 70 + 49 =
  8. 8.83 + 21 + 32 + 62 =
  9. 9.17 + 63 + 18 + 76 =
  10. 10.54 + 45 + 68 + 79 =
  11. 11.13 + 44 + 58 + 78 =
  12. 12.74 + 61 + 67 + 34 =
  13. 13.86 + 16 + 21 + 44 =
  14. 14.79 + 52 + 38 + 66 =
  15. 15.87 + 20 + 51 + 61 =
  16. 16.59 + 29 + 13 + 82 =
  17. 17.11 + 77 + 31 + 53 =
  18. 18.19 + 27 + 17 + 13 =
  19. 19.62 + 82 + 40 + 36 =
  20. 20.19 + 86 + 35 + 60 =
  21. 21.60 + 13 + 39 + 27 =
  22. 22.56 + 47 + 25 + 58 =
  23. 23.87 + 86 + 16 + 51 =
  24. 24.47 + 33 + 57 + 43 =
  25. 25.79 + 51 + 73 + 45 =
  26. 26.58 + 55 + 41 + 24 =
  27. 27.89 + 66 + 30 + 40 =
  28. 28.11 + 75 + 23 + 33 =
  29. 29.38 + 27 + 11 + 72 =
  30. 30.68 + 83 + 16 + 76 =
  31. 31.83 + 18 + 17 + 52 =
  32. 32.54 + 69 + 78 + 30 =
  33. 33.37 + 68 + 74 + 24 =
  34. 34.19 + 14 + 11 + 32 =
  35. 35.41 + 75 + 61 + 60 =
  36. 36.62 + 89 + 30 + 27 =
  37. 37.53 + 45 + 27 + 37 =
  38. 38.74 + 38 + 51 + 49 =
  39. 39.23 + 37 + 27 + 63 =
  40. 40.57 + 32 + 26 + 84 =

Answer key

  1. 85
  2. 178
  3. 254
  4. 161
  5. 240
  6. 167
  7. 148
  8. 198
  9. 174
  10. 246
  11. 193
  12. 236
  13. 167
  14. 235
  15. 219
  16. 183
  17. 172
  18. 76
  19. 220
  20. 200
  21. 139
  22. 186
  23. 240
  24. 180
  25. 248
  26. 178
  27. 225
  28. 142
  29. 148
  30. 243
  31. 170
  32. 231
  33. 203
  34. 76
  35. 237
  36. 208
  37. 162
  38. 212
  39. 150
  40. 199

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