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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 139 · 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. 1.44 + 76 + 72 + 30 =
  2. 2.61 + 33 + 17 + 57 =
  3. 3.56 + 18 + 56 + 76 =
  4. 4.49 + 11 + 67 + 14 =
  5. 5.16 + 32 + 26 + 64 =
  6. 6.28 + 46 + 17 + 14 =
  7. 7.31 + 78 + 67 + 27 =
  8. 8.31 + 17 + 85 + 85 =
  9. 9.22 + 38 + 74 + 27 =
  10. 10.62 + 34 + 21 + 30 =
  11. 11.31 + 64 + 57 + 81 =
  12. 12.35 + 56 + 44 + 25 =
  13. 13.85 + 64 + 27 + 81 =
  14. 14.63 + 24 + 32 + 56 =
  15. 15.79 + 22 + 57 + 89 =
  16. 16.40 + 80 + 14 + 52 =
  17. 17.82 + 86 + 34 + 71 =
  18. 18.16 + 74 + 25 + 68 =
  19. 19.50 + 50 + 42 + 62 =
  20. 20.46 + 20 + 65 + 29 =
  21. 21.83 + 88 + 64 + 28 =
  22. 22.14 + 52 + 61 + 29 =
  23. 23.46 + 27 + 65 + 45 =
  24. 24.18 + 66 + 18 + 51 =
  25. 25.85 + 83 + 34 + 84 =
  26. 26.66 + 21 + 59 + 12 =
  27. 27.25 + 37 + 76 + 75 =
  28. 28.52 + 33 + 16 + 52 =
  29. 29.74 + 37 + 54 + 27 =
  30. 30.61 + 25 + 42 + 19 =
  31. 31.80 + 16 + 15 + 25 =
  32. 32.81 + 26 + 56 + 86 =
  33. 33.71 + 48 + 54 + 69 =
  34. 34.55 + 49 + 21 + 61 =
  35. 35.25 + 42 + 50 + 20 =
  36. 36.52 + 78 + 34 + 46 =
  37. 37.29 + 20 + 31 + 21 =
  38. 38.30 + 74 + 45 + 43 =
  39. 39.56 + 64 + 50 + 40 =
  40. 40.45 + 29 + 47 + 40 =

Answer key

  1. 222
  2. 168
  3. 206
  4. 141
  5. 138
  6. 105
  7. 203
  8. 218
  9. 161
  10. 147
  11. 233
  12. 160
  13. 257
  14. 175
  15. 247
  16. 186
  17. 273
  18. 183
  19. 204
  20. 160
  21. 263
  22. 156
  23. 183
  24. 153
  25. 286
  26. 158
  27. 213
  28. 153
  29. 192
  30. 147
  31. 136
  32. 249
  33. 242
  34. 186
  35. 137
  36. 210
  37. 101
  38. 192
  39. 210
  40. 161

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