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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 898 · 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. 1.60 + 43 + 51 + 85 =
  2. 2.73 + 81 + 72 + 63 =
  3. 3.87 + 60 + 72 + 26 =
  4. 4.21 + 46 + 42 + 57 =
  5. 5.28 + 14 + 19 + 35 =
  6. 6.59 + 21 + 59 + 82 =
  7. 7.60 + 16 + 32 + 72 =
  8. 8.88 + 65 + 37 + 54 =
  9. 9.23 + 75 + 88 + 89 =
  10. 10.60 + 20 + 16 + 39 =
  11. 11.86 + 74 + 78 + 59 =
  12. 12.61 + 15 + 22 + 66 =
  13. 13.82 + 67 + 67 + 86 =
  14. 14.20 + 43 + 78 + 59 =
  15. 15.18 + 48 + 27 + 11 =
  16. 16.19 + 81 + 74 + 59 =
  17. 17.33 + 22 + 48 + 33 =
  18. 18.21 + 88 + 69 + 11 =
  19. 19.37 + 73 + 33 + 74 =
  20. 20.33 + 41 + 33 + 55 =
  21. 21.37 + 22 + 76 + 49 =
  22. 22.56 + 64 + 35 + 54 =
  23. 23.73 + 30 + 72 + 34 =
  24. 24.14 + 30 + 43 + 72 =
  25. 25.11 + 18 + 39 + 51 =
  26. 26.54 + 50 + 61 + 82 =
  27. 27.49 + 31 + 47 + 73 =
  28. 28.52 + 67 + 55 + 41 =
  29. 29.59 + 11 + 21 + 24 =
  30. 30.48 + 68 + 76 + 50 =
  31. 31.26 + 76 + 87 + 78 =
  32. 32.29 + 56 + 61 + 83 =
  33. 33.23 + 11 + 83 + 65 =
  34. 34.76 + 42 + 13 + 26 =
  35. 35.36 + 29 + 79 + 40 =
  36. 36.83 + 37 + 82 + 34 =
  37. 37.65 + 17 + 89 + 37 =
  38. 38.58 + 66 + 55 + 53 =
  39. 39.24 + 29 + 74 + 53 =
  40. 40.78 + 70 + 60 + 20 =

Answer key

  1. 239
  2. 289
  3. 245
  4. 166
  5. 96
  6. 221
  7. 180
  8. 244
  9. 275
  10. 135
  11. 297
  12. 164
  13. 302
  14. 200
  15. 104
  16. 233
  17. 136
  18. 189
  19. 217
  20. 162
  21. 184
  22. 209
  23. 209
  24. 159
  25. 119
  26. 247
  27. 200
  28. 215
  29. 115
  30. 242
  31. 267
  32. 229
  33. 182
  34. 157
  35. 184
  36. 236
  37. 208
  38. 232
  39. 180
  40. 228

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