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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 533 · 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. 1.28 + 21 + 11 + 42 =
  2. 2.19 + 12 + 33 + 22 =
  3. 3.45 + 26 + 22 + 16 =
  4. 4.26 + 81 + 26 + 68 =
  5. 5.57 + 15 + 42 + 84 =
  6. 6.43 + 30 + 88 + 87 =
  7. 7.88 + 58 + 45 + 19 =
  8. 8.27 + 48 + 54 + 53 =
  9. 9.65 + 85 + 89 + 44 =
  10. 10.19 + 27 + 42 + 27 =
  11. 11.82 + 30 + 53 + 55 =
  12. 12.15 + 79 + 21 + 88 =
  13. 13.54 + 81 + 31 + 53 =
  14. 14.36 + 74 + 15 + 85 =
  15. 15.74 + 40 + 24 + 77 =
  16. 16.27 + 17 + 14 + 31 =
  17. 17.71 + 67 + 41 + 41 =
  18. 18.65 + 12 + 89 + 26 =
  19. 19.31 + 72 + 45 + 62 =
  20. 20.26 + 29 + 31 + 36 =
  21. 21.80 + 18 + 58 + 17 =
  22. 22.83 + 76 + 18 + 78 =
  23. 23.87 + 60 + 30 + 44 =
  24. 24.52 + 20 + 77 + 79 =
  25. 25.79 + 32 + 70 + 16 =
  26. 26.63 + 79 + 15 + 57 =
  27. 27.42 + 77 + 52 + 38 =
  28. 28.68 + 86 + 28 + 39 =
  29. 29.34 + 81 + 59 + 63 =
  30. 30.59 + 27 + 83 + 14 =
  31. 31.86 + 83 + 73 + 28 =
  32. 32.30 + 43 + 43 + 25 =
  33. 33.28 + 34 + 14 + 59 =
  34. 34.56 + 26 + 89 + 67 =
  35. 35.21 + 89 + 18 + 36 =
  36. 36.75 + 48 + 38 + 17 =
  37. 37.55 + 29 + 58 + 58 =
  38. 38.15 + 34 + 82 + 71 =
  39. 39.78 + 51 + 64 + 34 =
  40. 40.75 + 60 + 16 + 68 =

Answer key

  1. 102
  2. 86
  3. 109
  4. 201
  5. 198
  6. 248
  7. 210
  8. 182
  9. 283
  10. 115
  11. 220
  12. 203
  13. 219
  14. 210
  15. 215
  16. 89
  17. 220
  18. 192
  19. 210
  20. 122
  21. 173
  22. 255
  23. 221
  24. 228
  25. 197
  26. 214
  27. 209
  28. 221
  29. 237
  30. 183
  31. 270
  32. 141
  33. 135
  34. 238
  35. 164
  36. 178
  37. 200
  38. 202
  39. 227
  40. 219

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