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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 566 · 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. 1.29 + 22 + 50 + 28 =
  2. 2.40 + 25 + 78 + 62 =
  3. 3.76 + 27 + 72 + 51 =
  4. 4.34 + 31 + 22 + 35 =
  5. 5.20 + 27 + 30 + 73 =
  6. 6.72 + 37 + 77 + 67 =
  7. 7.30 + 67 + 53 + 42 =
  8. 8.39 + 29 + 30 + 15 =
  9. 9.75 + 62 + 52 + 23 =
  10. 10.69 + 36 + 78 + 64 =
  11. 11.76 + 56 + 46 + 81 =
  12. 12.22 + 69 + 67 + 28 =
  13. 13.33 + 58 + 85 + 44 =
  14. 14.61 + 33 + 40 + 50 =
  15. 15.53 + 46 + 17 + 12 =
  16. 16.58 + 16 + 37 + 65 =
  17. 17.11 + 81 + 87 + 15 =
  18. 18.70 + 29 + 85 + 32 =
  19. 19.16 + 82 + 73 + 24 =
  20. 20.26 + 64 + 33 + 67 =
  21. 21.78 + 48 + 23 + 70 =
  22. 22.30 + 84 + 52 + 73 =
  23. 23.75 + 29 + 25 + 31 =
  24. 24.24 + 34 + 33 + 79 =
  25. 25.38 + 52 + 79 + 54 =
  26. 26.26 + 27 + 75 + 52 =
  27. 27.69 + 50 + 72 + 65 =
  28. 28.40 + 48 + 43 + 37 =
  29. 29.76 + 14 + 87 + 40 =
  30. 30.75 + 57 + 54 + 60 =
  31. 31.70 + 19 + 89 + 53 =
  32. 32.20 + 64 + 59 + 30 =
  33. 33.78 + 84 + 16 + 74 =
  34. 34.35 + 57 + 74 + 76 =
  35. 35.33 + 35 + 51 + 38 =
  36. 36.85 + 49 + 35 + 29 =
  37. 37.39 + 26 + 78 + 89 =
  38. 38.11 + 39 + 19 + 81 =
  39. 39.87 + 83 + 39 + 49 =
  40. 40.58 + 33 + 45 + 16 =

Answer key

  1. 129
  2. 205
  3. 226
  4. 122
  5. 150
  6. 253
  7. 192
  8. 113
  9. 212
  10. 247
  11. 259
  12. 186
  13. 220
  14. 184
  15. 128
  16. 176
  17. 194
  18. 216
  19. 195
  20. 190
  21. 219
  22. 239
  23. 160
  24. 170
  25. 223
  26. 180
  27. 256
  28. 168
  29. 217
  30. 246
  31. 231
  32. 173
  33. 252
  34. 242
  35. 157
  36. 198
  37. 232
  38. 150
  39. 258
  40. 152

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