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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 469 · 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. 1.88 + 69 + 57 + 67 =
  2. 2.83 + 31 + 29 + 36 =
  3. 3.45 + 57 + 23 + 41 =
  4. 4.61 + 31 + 18 + 55 =
  5. 5.14 + 65 + 43 + 13 =
  6. 6.30 + 60 + 80 + 89 =
  7. 7.15 + 21 + 68 + 61 =
  8. 8.59 + 26 + 19 + 77 =
  9. 9.42 + 37 + 70 + 61 =
  10. 10.67 + 24 + 37 + 50 =
  11. 11.87 + 47 + 43 + 40 =
  12. 12.77 + 65 + 87 + 86 =
  13. 13.78 + 52 + 29 + 42 =
  14. 14.75 + 52 + 18 + 31 =
  15. 15.12 + 23 + 72 + 45 =
  16. 16.88 + 88 + 70 + 88 =
  17. 17.81 + 67 + 36 + 42 =
  18. 18.80 + 75 + 29 + 70 =
  19. 19.76 + 41 + 19 + 83 =
  20. 20.81 + 33 + 70 + 71 =
  21. 21.43 + 70 + 77 + 71 =
  22. 22.72 + 67 + 75 + 82 =
  23. 23.82 + 19 + 68 + 73 =
  24. 24.82 + 16 + 81 + 86 =
  25. 25.67 + 64 + 55 + 21 =
  26. 26.25 + 81 + 84 + 26 =
  27. 27.47 + 87 + 80 + 65 =
  28. 28.37 + 73 + 26 + 24 =
  29. 29.75 + 43 + 35 + 25 =
  30. 30.89 + 12 + 12 + 67 =
  31. 31.40 + 47 + 87 + 31 =
  32. 32.15 + 75 + 51 + 21 =
  33. 33.78 + 26 + 56 + 38 =
  34. 34.11 + 24 + 27 + 28 =
  35. 35.76 + 18 + 20 + 67 =
  36. 36.86 + 12 + 70 + 74 =
  37. 37.21 + 33 + 28 + 45 =
  38. 38.34 + 68 + 40 + 89 =
  39. 39.29 + 44 + 36 + 24 =
  40. 40.32 + 72 + 72 + 75 =

Answer key

  1. 281
  2. 179
  3. 166
  4. 165
  5. 135
  6. 259
  7. 165
  8. 181
  9. 210
  10. 178
  11. 217
  12. 315
  13. 201
  14. 176
  15. 152
  16. 334
  17. 226
  18. 254
  19. 219
  20. 255
  21. 261
  22. 296
  23. 242
  24. 265
  25. 207
  26. 216
  27. 279
  28. 160
  29. 178
  30. 180
  31. 205
  32. 162
  33. 198
  34. 90
  35. 181
  36. 242
  37. 127
  38. 231
  39. 133
  40. 251

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