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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 828 · 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. 1.30 + 13 + 65 + 82 =
  2. 2.55 + 69 + 83 + 41 =
  3. 3.16 + 19 + 49 + 45 =
  4. 4.31 + 46 + 83 + 37 =
  5. 5.82 + 40 + 72 + 26 =
  6. 6.31 + 48 + 11 + 43 =
  7. 7.32 + 13 + 42 + 45 =
  8. 8.70 + 54 + 39 + 75 =
  9. 9.84 + 81 + 14 + 78 =
  10. 10.78 + 31 + 49 + 29 =
  11. 11.76 + 53 + 24 + 55 =
  12. 12.32 + 85 + 81 + 53 =
  13. 13.63 + 71 + 11 + 20 =
  14. 14.14 + 40 + 33 + 88 =
  15. 15.67 + 19 + 44 + 32 =
  16. 16.88 + 61 + 67 + 50 =
  17. 17.75 + 43 + 31 + 30 =
  18. 18.27 + 40 + 74 + 31 =
  19. 19.80 + 31 + 40 + 53 =
  20. 20.77 + 40 + 18 + 45 =
  21. 21.80 + 47 + 32 + 73 =
  22. 22.34 + 54 + 51 + 50 =
  23. 23.77 + 62 + 86 + 70 =
  24. 24.56 + 45 + 12 + 89 =
  25. 25.18 + 52 + 12 + 31 =
  26. 26.78 + 40 + 24 + 44 =
  27. 27.89 + 33 + 46 + 16 =
  28. 28.26 + 22 + 70 + 86 =
  29. 29.26 + 32 + 50 + 23 =
  30. 30.20 + 83 + 25 + 52 =
  31. 31.28 + 37 + 76 + 58 =
  32. 32.65 + 87 + 70 + 71 =
  33. 33.62 + 64 + 31 + 57 =
  34. 34.89 + 39 + 12 + 30 =
  35. 35.37 + 77 + 84 + 34 =
  36. 36.72 + 27 + 11 + 75 =
  37. 37.45 + 89 + 23 + 56 =
  38. 38.77 + 30 + 26 + 54 =
  39. 39.32 + 12 + 62 + 83 =
  40. 40.18 + 28 + 42 + 27 =

Answer key

  1. 190
  2. 248
  3. 129
  4. 197
  5. 220
  6. 133
  7. 132
  8. 238
  9. 257
  10. 187
  11. 208
  12. 251
  13. 165
  14. 175
  15. 162
  16. 266
  17. 179
  18. 172
  19. 204
  20. 180
  21. 232
  22. 189
  23. 295
  24. 202
  25. 113
  26. 186
  27. 184
  28. 204
  29. 131
  30. 180
  31. 199
  32. 293
  33. 214
  34. 170
  35. 232
  36. 185
  37. 213
  38. 187
  39. 189
  40. 115

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