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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 928 · 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. 1.49 + 26 + 65 + 53 =
  2. 2.65 + 82 + 13 + 86 =
  3. 3.43 + 27 + 67 + 34 =
  4. 4.57 + 88 + 58 + 56 =
  5. 5.52 + 36 + 33 + 25 =
  6. 6.40 + 73 + 23 + 64 =
  7. 7.24 + 80 + 35 + 71 =
  8. 8.66 + 23 + 80 + 52 =
  9. 9.32 + 61 + 58 + 57 =
  10. 10.45 + 14 + 55 + 56 =
  11. 11.55 + 78 + 66 + 16 =
  12. 12.34 + 47 + 12 + 81 =
  13. 13.68 + 21 + 67 + 85 =
  14. 14.15 + 43 + 26 + 33 =
  15. 15.17 + 37 + 81 + 72 =
  16. 16.14 + 55 + 72 + 60 =
  17. 17.18 + 26 + 24 + 15 =
  18. 18.21 + 35 + 14 + 19 =
  19. 19.43 + 53 + 41 + 69 =
  20. 20.51 + 48 + 40 + 56 =
  21. 21.32 + 58 + 57 + 72 =
  22. 22.39 + 58 + 83 + 81 =
  23. 23.78 + 46 + 70 + 58 =
  24. 24.41 + 76 + 29 + 65 =
  25. 25.33 + 69 + 61 + 86 =
  26. 26.50 + 27 + 19 + 36 =
  27. 27.18 + 51 + 40 + 61 =
  28. 28.20 + 19 + 44 + 85 =
  29. 29.23 + 52 + 88 + 66 =
  30. 30.55 + 67 + 15 + 32 =
  31. 31.29 + 71 + 23 + 38 =
  32. 32.35 + 42 + 43 + 65 =
  33. 33.18 + 44 + 20 + 42 =
  34. 34.58 + 48 + 59 + 12 =
  35. 35.87 + 41 + 69 + 83 =
  36. 36.23 + 78 + 28 + 87 =
  37. 37.81 + 47 + 28 + 62 =
  38. 38.15 + 11 + 37 + 12 =
  39. 39.22 + 11 + 53 + 85 =
  40. 40.74 + 35 + 83 + 44 =

Answer key

  1. 193
  2. 246
  3. 171
  4. 259
  5. 146
  6. 200
  7. 210
  8. 221
  9. 208
  10. 170
  11. 215
  12. 174
  13. 241
  14. 117
  15. 207
  16. 201
  17. 83
  18. 89
  19. 206
  20. 195
  21. 219
  22. 261
  23. 252
  24. 211
  25. 249
  26. 132
  27. 170
  28. 168
  29. 229
  30. 169
  31. 161
  32. 185
  33. 124
  34. 177
  35. 280
  36. 216
  37. 218
  38. 75
  39. 171
  40. 236

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