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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 875 · 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. 1.19 + 45 + 31 + 44 =
  2. 2.86 + 35 + 60 + 52 =
  3. 3.36 + 51 + 15 + 84 =
  4. 4.38 + 82 + 86 + 22 =
  5. 5.45 + 52 + 26 + 47 =
  6. 6.85 + 44 + 39 + 89 =
  7. 7.53 + 87 + 32 + 16 =
  8. 8.35 + 44 + 87 + 65 =
  9. 9.38 + 51 + 34 + 25 =
  10. 10.20 + 71 + 28 + 52 =
  11. 11.79 + 28 + 87 + 87 =
  12. 12.58 + 82 + 57 + 22 =
  13. 13.44 + 70 + 57 + 28 =
  14. 14.42 + 53 + 41 + 35 =
  15. 15.53 + 35 + 20 + 82 =
  16. 16.71 + 87 + 14 + 74 =
  17. 17.28 + 78 + 64 + 53 =
  18. 18.85 + 40 + 50 + 16 =
  19. 19.82 + 81 + 54 + 38 =
  20. 20.45 + 75 + 57 + 88 =
  21. 21.30 + 71 + 25 + 86 =
  22. 22.61 + 20 + 89 + 69 =
  23. 23.73 + 63 + 53 + 11 =
  24. 24.56 + 34 + 63 + 77 =
  25. 25.87 + 70 + 84 + 63 =
  26. 26.18 + 41 + 13 + 66 =
  27. 27.85 + 56 + 72 + 14 =
  28. 28.35 + 48 + 32 + 14 =
  29. 29.66 + 51 + 55 + 78 =
  30. 30.36 + 48 + 69 + 69 =
  31. 31.76 + 30 + 14 + 55 =
  32. 32.82 + 71 + 71 + 46 =
  33. 33.64 + 15 + 15 + 62 =
  34. 34.47 + 49 + 76 + 51 =
  35. 35.21 + 39 + 62 + 19 =
  36. 36.13 + 57 + 36 + 76 =
  37. 37.62 + 26 + 60 + 82 =
  38. 38.41 + 19 + 48 + 36 =
  39. 39.89 + 23 + 18 + 20 =
  40. 40.37 + 33 + 34 + 16 =

Answer key

  1. 139
  2. 233
  3. 186
  4. 228
  5. 170
  6. 257
  7. 188
  8. 231
  9. 148
  10. 171
  11. 281
  12. 219
  13. 199
  14. 171
  15. 190
  16. 246
  17. 223
  18. 191
  19. 255
  20. 265
  21. 212
  22. 239
  23. 200
  24. 230
  25. 304
  26. 138
  27. 227
  28. 129
  29. 250
  30. 222
  31. 175
  32. 270
  33. 156
  34. 223
  35. 141
  36. 182
  37. 230
  38. 144
  39. 150
  40. 120

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