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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 530 · 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. 1.84 + 26 + 26 + 11 =
  2. 2.49 + 18 + 63 + 64 =
  3. 3.54 + 83 + 11 + 24 =
  4. 4.89 + 24 + 32 + 88 =
  5. 5.73 + 79 + 18 + 32 =
  6. 6.25 + 11 + 21 + 21 =
  7. 7.12 + 17 + 79 + 82 =
  8. 8.81 + 46 + 55 + 26 =
  9. 9.53 + 54 + 20 + 40 =
  10. 10.87 + 16 + 57 + 31 =
  11. 11.30 + 30 + 35 + 29 =
  12. 12.14 + 51 + 63 + 82 =
  13. 13.32 + 73 + 75 + 70 =
  14. 14.51 + 41 + 69 + 36 =
  15. 15.86 + 15 + 82 + 76 =
  16. 16.50 + 64 + 47 + 14 =
  17. 17.23 + 11 + 52 + 13 =
  18. 18.56 + 89 + 49 + 58 =
  19. 19.82 + 68 + 77 + 55 =
  20. 20.42 + 13 + 20 + 12 =
  21. 21.60 + 60 + 16 + 61 =
  22. 22.45 + 19 + 81 + 29 =
  23. 23.53 + 68 + 65 + 11 =
  24. 24.73 + 37 + 46 + 81 =
  25. 25.70 + 79 + 77 + 67 =
  26. 26.16 + 41 + 81 + 14 =
  27. 27.37 + 63 + 52 + 22 =
  28. 28.59 + 62 + 29 + 28 =
  29. 29.23 + 41 + 35 + 78 =
  30. 30.25 + 78 + 33 + 19 =
  31. 31.18 + 22 + 22 + 66 =
  32. 32.89 + 44 + 80 + 40 =
  33. 33.69 + 51 + 19 + 72 =
  34. 34.56 + 45 + 13 + 45 =
  35. 35.75 + 19 + 85 + 44 =
  36. 36.46 + 59 + 55 + 18 =
  37. 37.45 + 14 + 68 + 24 =
  38. 38.22 + 35 + 58 + 46 =
  39. 39.44 + 56 + 66 + 53 =
  40. 40.44 + 30 + 57 + 46 =

Answer key

  1. 147
  2. 194
  3. 172
  4. 233
  5. 202
  6. 78
  7. 190
  8. 208
  9. 167
  10. 191
  11. 124
  12. 210
  13. 250
  14. 197
  15. 259
  16. 175
  17. 99
  18. 252
  19. 282
  20. 87
  21. 197
  22. 174
  23. 197
  24. 237
  25. 293
  26. 152
  27. 174
  28. 178
  29. 177
  30. 155
  31. 128
  32. 253
  33. 211
  34. 159
  35. 223
  36. 178
  37. 151
  38. 161
  39. 219
  40. 177

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