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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 732 · 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. 1.11 + 59 + 22 + 66 =
  2. 2.71 + 84 + 82 + 21 =
  3. 3.59 + 35 + 25 + 69 =
  4. 4.55 + 72 + 83 + 84 =
  5. 5.41 + 60 + 72 + 70 =
  6. 6.38 + 57 + 87 + 89 =
  7. 7.40 + 71 + 46 + 72 =
  8. 8.37 + 22 + 18 + 45 =
  9. 9.52 + 12 + 71 + 78 =
  10. 10.16 + 80 + 65 + 54 =
  11. 11.28 + 20 + 67 + 38 =
  12. 12.45 + 83 + 12 + 80 =
  13. 13.64 + 41 + 29 + 30 =
  14. 14.61 + 13 + 23 + 13 =
  15. 15.38 + 84 + 21 + 49 =
  16. 16.19 + 15 + 30 + 78 =
  17. 17.17 + 75 + 15 + 40 =
  18. 18.64 + 29 + 38 + 69 =
  19. 19.14 + 37 + 28 + 15 =
  20. 20.77 + 78 + 54 + 20 =
  21. 21.64 + 61 + 88 + 50 =
  22. 22.36 + 81 + 41 + 23 =
  23. 23.80 + 47 + 76 + 79 =
  24. 24.22 + 28 + 42 + 86 =
  25. 25.79 + 43 + 13 + 79 =
  26. 26.74 + 35 + 63 + 71 =
  27. 27.47 + 39 + 15 + 65 =
  28. 28.15 + 36 + 62 + 30 =
  29. 29.49 + 83 + 29 + 52 =
  30. 30.29 + 22 + 66 + 32 =
  31. 31.57 + 64 + 21 + 88 =
  32. 32.42 + 82 + 78 + 60 =
  33. 33.64 + 63 + 23 + 52 =
  34. 34.71 + 35 + 73 + 52 =
  35. 35.39 + 71 + 14 + 18 =
  36. 36.42 + 23 + 82 + 88 =
  37. 37.32 + 16 + 55 + 61 =
  38. 38.74 + 73 + 30 + 11 =
  39. 39.30 + 59 + 62 + 77 =
  40. 40.68 + 84 + 64 + 45 =

Answer key

  1. 158
  2. 258
  3. 188
  4. 294
  5. 243
  6. 271
  7. 229
  8. 122
  9. 213
  10. 215
  11. 153
  12. 220
  13. 164
  14. 110
  15. 192
  16. 142
  17. 147
  18. 200
  19. 94
  20. 229
  21. 263
  22. 181
  23. 282
  24. 178
  25. 214
  26. 243
  27. 166
  28. 143
  29. 213
  30. 149
  31. 230
  32. 262
  33. 202
  34. 231
  35. 142
  36. 235
  37. 164
  38. 188
  39. 228
  40. 261

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