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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 62 · 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. 1.34 + 80 + 33 + 84 =
  2. 2.74 + 16 + 55 + 86 =
  3. 3.82 + 49 + 45 + 83 =
  4. 4.54 + 49 + 61 + 60 =
  5. 5.18 + 49 + 82 + 14 =
  6. 6.67 + 59 + 19 + 13 =
  7. 7.17 + 59 + 26 + 15 =
  8. 8.20 + 15 + 66 + 27 =
  9. 9.85 + 32 + 24 + 29 =
  10. 10.87 + 74 + 20 + 86 =
  11. 11.75 + 29 + 76 + 39 =
  12. 12.40 + 20 + 18 + 53 =
  13. 13.41 + 82 + 60 + 66 =
  14. 14.72 + 30 + 71 + 18 =
  15. 15.89 + 39 + 50 + 38 =
  16. 16.30 + 52 + 16 + 71 =
  17. 17.21 + 47 + 27 + 22 =
  18. 18.16 + 60 + 33 + 81 =
  19. 19.55 + 28 + 17 + 67 =
  20. 20.81 + 13 + 52 + 59 =
  21. 21.54 + 75 + 42 + 52 =
  22. 22.11 + 83 + 89 + 67 =
  23. 23.89 + 60 + 22 + 39 =
  24. 24.25 + 28 + 60 + 36 =
  25. 25.35 + 22 + 70 + 82 =
  26. 26.39 + 89 + 33 + 45 =
  27. 27.31 + 53 + 50 + 35 =
  28. 28.61 + 88 + 28 + 30 =
  29. 29.84 + 80 + 41 + 52 =
  30. 30.47 + 32 + 13 + 19 =
  31. 31.48 + 79 + 64 + 70 =
  32. 32.56 + 24 + 38 + 38 =
  33. 33.16 + 12 + 65 + 82 =
  34. 34.30 + 88 + 61 + 89 =
  35. 35.73 + 62 + 25 + 32 =
  36. 36.17 + 88 + 61 + 44 =
  37. 37.84 + 73 + 84 + 42 =
  38. 38.55 + 82 + 48 + 58 =
  39. 39.82 + 51 + 49 + 36 =
  40. 40.47 + 19 + 60 + 84 =

Answer key

  1. 231
  2. 231
  3. 259
  4. 224
  5. 163
  6. 158
  7. 117
  8. 128
  9. 170
  10. 267
  11. 219
  12. 131
  13. 249
  14. 191
  15. 216
  16. 169
  17. 117
  18. 190
  19. 167
  20. 205
  21. 223
  22. 250
  23. 210
  24. 149
  25. 209
  26. 206
  27. 169
  28. 207
  29. 257
  30. 111
  31. 261
  32. 156
  33. 175
  34. 268
  35. 192
  36. 210
  37. 283
  38. 243
  39. 218
  40. 210

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