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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 7 · 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. 1.40 + 24 + 27 + 85 =
  2. 2.13 + 43 + 44 + 75 =
  3. 3.28 + 22 + 67 + 69 =
  4. 4.72 + 86 + 13 + 27 =
  5. 5.30 + 22 + 34 + 27 =
  6. 6.73 + 20 + 28 + 80 =
  7. 7.24 + 29 + 55 + 12 =
  8. 8.78 + 12 + 77 + 30 =
  9. 9.85 + 66 + 84 + 45 =
  10. 10.26 + 82 + 46 + 13 =
  11. 11.23 + 17 + 17 + 68 =
  12. 12.18 + 34 + 77 + 77 =
  13. 13.34 + 32 + 54 + 16 =
  14. 14.62 + 89 + 46 + 27 =
  15. 15.74 + 79 + 78 + 39 =
  16. 16.62 + 12 + 23 + 19 =
  17. 17.58 + 36 + 67 + 86 =
  18. 18.65 + 31 + 86 + 38 =
  19. 19.23 + 89 + 67 + 48 =
  20. 20.20 + 87 + 37 + 51 =
  21. 21.81 + 33 + 86 + 50 =
  22. 22.86 + 32 + 43 + 60 =
  23. 23.84 + 16 + 85 + 14 =
  24. 24.13 + 57 + 51 + 23 =
  25. 25.78 + 23 + 58 + 78 =
  26. 26.26 + 32 + 51 + 17 =
  27. 27.80 + 35 + 78 + 53 =
  28. 28.42 + 12 + 81 + 18 =
  29. 29.43 + 32 + 78 + 53 =
  30. 30.73 + 51 + 86 + 36 =
  31. 31.39 + 86 + 29 + 62 =
  32. 32.23 + 12 + 55 + 32 =
  33. 33.12 + 80 + 85 + 39 =
  34. 34.16 + 29 + 27 + 28 =
  35. 35.25 + 88 + 32 + 21 =
  36. 36.85 + 13 + 34 + 16 =
  37. 37.11 + 32 + 75 + 72 =
  38. 38.49 + 88 + 33 + 71 =
  39. 39.39 + 62 + 19 + 30 =
  40. 40.25 + 61 + 33 + 37 =

Answer key

  1. 176
  2. 175
  3. 186
  4. 198
  5. 113
  6. 201
  7. 120
  8. 197
  9. 280
  10. 167
  11. 125
  12. 206
  13. 136
  14. 224
  15. 270
  16. 116
  17. 247
  18. 220
  19. 227
  20. 195
  21. 250
  22. 221
  23. 199
  24. 144
  25. 237
  26. 126
  27. 246
  28. 153
  29. 206
  30. 246
  31. 216
  32. 122
  33. 216
  34. 100
  35. 166
  36. 148
  37. 190
  38. 241
  39. 150
  40. 156

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