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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 838 · 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. 1.14 + 21 + 57 + 54 =
  2. 2.17 + 70 + 81 + 79 =
  3. 3.70 + 47 + 38 + 12 =
  4. 4.18 + 63 + 71 + 32 =
  5. 5.74 + 31 + 48 + 68 =
  6. 6.42 + 63 + 73 + 24 =
  7. 7.16 + 39 + 65 + 86 =
  8. 8.25 + 67 + 77 + 61 =
  9. 9.65 + 69 + 39 + 13 =
  10. 10.39 + 13 + 32 + 60 =
  11. 11.12 + 35 + 81 + 11 =
  12. 12.21 + 60 + 37 + 75 =
  13. 13.46 + 23 + 38 + 86 =
  14. 14.77 + 74 + 88 + 57 =
  15. 15.57 + 34 + 21 + 25 =
  16. 16.82 + 43 + 58 + 89 =
  17. 17.17 + 68 + 88 + 18 =
  18. 18.42 + 29 + 13 + 44 =
  19. 19.74 + 21 + 33 + 54 =
  20. 20.79 + 27 + 45 + 58 =
  21. 21.21 + 46 + 75 + 87 =
  22. 22.30 + 22 + 54 + 23 =
  23. 23.62 + 43 + 48 + 69 =
  24. 24.30 + 59 + 77 + 16 =
  25. 25.61 + 62 + 23 + 21 =
  26. 26.33 + 19 + 27 + 52 =
  27. 27.20 + 30 + 42 + 78 =
  28. 28.68 + 57 + 26 + 22 =
  29. 29.12 + 61 + 58 + 68 =
  30. 30.55 + 20 + 16 + 50 =
  31. 31.32 + 48 + 53 + 84 =
  32. 32.35 + 58 + 67 + 72 =
  33. 33.80 + 76 + 49 + 51 =
  34. 34.77 + 32 + 88 + 48 =
  35. 35.71 + 19 + 26 + 22 =
  36. 36.35 + 65 + 42 + 15 =
  37. 37.89 + 15 + 84 + 22 =
  38. 38.89 + 34 + 20 + 28 =
  39. 39.80 + 44 + 16 + 14 =
  40. 40.19 + 40 + 29 + 29 =

Answer key

  1. 146
  2. 247
  3. 167
  4. 184
  5. 221
  6. 202
  7. 206
  8. 230
  9. 186
  10. 144
  11. 139
  12. 193
  13. 193
  14. 296
  15. 137
  16. 272
  17. 191
  18. 128
  19. 182
  20. 209
  21. 229
  22. 129
  23. 222
  24. 182
  25. 167
  26. 131
  27. 170
  28. 173
  29. 199
  30. 141
  31. 217
  32. 232
  33. 256
  34. 245
  35. 138
  36. 157
  37. 210
  38. 171
  39. 154
  40. 117

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