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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 506 · 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 + 42 + 72 + 49 =
  2. 2.35 + 33 + 88 + 81 =
  3. 3.62 + 34 + 74 + 16 =
  4. 4.38 + 14 + 45 + 67 =
  5. 5.62 + 39 + 31 + 86 =
  6. 6.36 + 39 + 27 + 56 =
  7. 7.58 + 41 + 73 + 80 =
  8. 8.17 + 26 + 11 + 61 =
  9. 9.63 + 88 + 11 + 60 =
  10. 10.69 + 48 + 44 + 38 =
  11. 11.19 + 51 + 29 + 20 =
  12. 12.45 + 28 + 15 + 35 =
  13. 13.62 + 31 + 77 + 30 =
  14. 14.24 + 16 + 58 + 15 =
  15. 15.23 + 43 + 72 + 24 =
  16. 16.79 + 58 + 82 + 28 =
  17. 17.33 + 64 + 20 + 68 =
  18. 18.43 + 56 + 63 + 45 =
  19. 19.76 + 83 + 80 + 35 =
  20. 20.21 + 47 + 44 + 67 =
  21. 21.59 + 59 + 30 + 74 =
  22. 22.59 + 46 + 57 + 85 =
  23. 23.49 + 34 + 13 + 26 =
  24. 24.15 + 17 + 65 + 20 =
  25. 25.35 + 37 + 55 + 25 =
  26. 26.39 + 77 + 88 + 19 =
  27. 27.82 + 80 + 29 + 66 =
  28. 28.32 + 75 + 26 + 76 =
  29. 29.60 + 23 + 26 + 37 =
  30. 30.51 + 58 + 62 + 51 =
  31. 31.12 + 29 + 81 + 85 =
  32. 32.74 + 49 + 89 + 86 =
  33. 33.12 + 89 + 72 + 60 =
  34. 34.38 + 83 + 63 + 14 =
  35. 35.80 + 33 + 74 + 33 =
  36. 36.45 + 87 + 38 + 72 =
  37. 37.77 + 28 + 38 + 65 =
  38. 38.77 + 60 + 69 + 15 =
  39. 39.56 + 85 + 50 + 32 =
  40. 40.77 + 35 + 17 + 24 =

Answer key

  1. 184
  2. 237
  3. 186
  4. 164
  5. 218
  6. 158
  7. 252
  8. 115
  9. 222
  10. 199
  11. 119
  12. 123
  13. 200
  14. 113
  15. 162
  16. 247
  17. 185
  18. 207
  19. 274
  20. 179
  21. 222
  22. 247
  23. 122
  24. 117
  25. 152
  26. 223
  27. 257
  28. 209
  29. 146
  30. 222
  31. 207
  32. 298
  33. 233
  34. 198
  35. 220
  36. 242
  37. 208
  38. 221
  39. 223
  40. 153

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