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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 520 · 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. 1.21 + 66 + 85 + 18 =
  2. 2.32 + 31 + 36 + 11 =
  3. 3.39 + 16 + 26 + 73 =
  4. 4.16 + 38 + 33 + 89 =
  5. 5.35 + 31 + 89 + 72 =
  6. 6.89 + 64 + 16 + 19 =
  7. 7.50 + 45 + 46 + 80 =
  8. 8.67 + 30 + 54 + 24 =
  9. 9.39 + 67 + 69 + 21 =
  10. 10.35 + 32 + 80 + 28 =
  11. 11.48 + 29 + 34 + 27 =
  12. 12.18 + 35 + 55 + 61 =
  13. 13.69 + 51 + 51 + 42 =
  14. 14.46 + 13 + 13 + 89 =
  15. 15.58 + 87 + 57 + 82 =
  16. 16.59 + 16 + 15 + 33 =
  17. 17.83 + 30 + 81 + 59 =
  18. 18.54 + 57 + 83 + 33 =
  19. 19.87 + 20 + 37 + 26 =
  20. 20.19 + 25 + 38 + 42 =
  21. 21.33 + 60 + 17 + 17 =
  22. 22.22 + 16 + 44 + 46 =
  23. 23.39 + 87 + 12 + 54 =
  24. 24.20 + 82 + 81 + 32 =
  25. 25.16 + 38 + 49 + 31 =
  26. 26.34 + 74 + 14 + 11 =
  27. 27.75 + 16 + 17 + 33 =
  28. 28.35 + 29 + 24 + 24 =
  29. 29.81 + 77 + 64 + 39 =
  30. 30.26 + 51 + 89 + 12 =
  31. 31.59 + 49 + 13 + 43 =
  32. 32.76 + 62 + 39 + 47 =
  33. 33.81 + 56 + 19 + 39 =
  34. 34.59 + 36 + 28 + 19 =
  35. 35.59 + 22 + 66 + 89 =
  36. 36.32 + 70 + 24 + 21 =
  37. 37.13 + 63 + 60 + 11 =
  38. 38.45 + 17 + 30 + 26 =
  39. 39.17 + 45 + 85 + 52 =
  40. 40.85 + 32 + 89 + 32 =

Answer key

  1. 190
  2. 110
  3. 154
  4. 176
  5. 227
  6. 188
  7. 221
  8. 175
  9. 196
  10. 175
  11. 138
  12. 169
  13. 213
  14. 161
  15. 284
  16. 123
  17. 253
  18. 227
  19. 170
  20. 124
  21. 127
  22. 128
  23. 192
  24. 215
  25. 134
  26. 133
  27. 141
  28. 112
  29. 261
  30. 178
  31. 164
  32. 224
  33. 195
  34. 142
  35. 236
  36. 147
  37. 147
  38. 118
  39. 199
  40. 238

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