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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 805 · 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. 1.63 + 19 + 41 + 84 =
  2. 2.62 + 43 + 54 + 86 =
  3. 3.30 + 75 + 27 + 42 =
  4. 4.61 + 69 + 76 + 84 =
  5. 5.56 + 72 + 53 + 29 =
  6. 6.13 + 87 + 28 + 63 =
  7. 7.35 + 61 + 24 + 40 =
  8. 8.61 + 33 + 45 + 49 =
  9. 9.13 + 36 + 30 + 62 =
  10. 10.68 + 19 + 28 + 59 =
  11. 11.53 + 66 + 74 + 32 =
  12. 12.60 + 52 + 38 + 35 =
  13. 13.79 + 45 + 57 + 83 =
  14. 14.31 + 79 + 70 + 75 =
  15. 15.70 + 71 + 41 + 47 =
  16. 16.52 + 82 + 85 + 18 =
  17. 17.78 + 58 + 33 + 49 =
  18. 18.56 + 53 + 75 + 88 =
  19. 19.73 + 14 + 51 + 71 =
  20. 20.57 + 72 + 45 + 87 =
  21. 21.54 + 35 + 27 + 48 =
  22. 22.31 + 61 + 53 + 40 =
  23. 23.67 + 73 + 48 + 31 =
  24. 24.21 + 32 + 34 + 89 =
  25. 25.88 + 88 + 68 + 78 =
  26. 26.15 + 14 + 34 + 79 =
  27. 27.28 + 21 + 31 + 31 =
  28. 28.69 + 22 + 22 + 39 =
  29. 29.50 + 43 + 49 + 78 =
  30. 30.41 + 11 + 44 + 79 =
  31. 31.57 + 57 + 60 + 28 =
  32. 32.39 + 80 + 58 + 80 =
  33. 33.30 + 76 + 62 + 88 =
  34. 34.12 + 64 + 68 + 39 =
  35. 35.53 + 71 + 38 + 53 =
  36. 36.38 + 16 + 68 + 28 =
  37. 37.29 + 17 + 24 + 31 =
  38. 38.85 + 54 + 37 + 39 =
  39. 39.44 + 64 + 73 + 73 =
  40. 40.59 + 71 + 45 + 42 =

Answer key

  1. 207
  2. 245
  3. 174
  4. 290
  5. 210
  6. 191
  7. 160
  8. 188
  9. 141
  10. 174
  11. 225
  12. 185
  13. 264
  14. 255
  15. 229
  16. 237
  17. 218
  18. 272
  19. 209
  20. 261
  21. 164
  22. 185
  23. 219
  24. 176
  25. 322
  26. 142
  27. 111
  28. 152
  29. 220
  30. 175
  31. 202
  32. 257
  33. 256
  34. 183
  35. 215
  36. 150
  37. 101
  38. 215
  39. 254
  40. 217

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