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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 341 · 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. 1.56 + 59 + 81 + 47 =
  2. 2.79 + 50 + 75 + 24 =
  3. 3.18 + 72 + 62 + 63 =
  4. 4.12 + 51 + 27 + 27 =
  5. 5.15 + 12 + 67 + 19 =
  6. 6.64 + 43 + 21 + 57 =
  7. 7.56 + 25 + 40 + 18 =
  8. 8.53 + 51 + 46 + 39 =
  9. 9.33 + 26 + 83 + 72 =
  10. 10.16 + 57 + 87 + 43 =
  11. 11.24 + 70 + 28 + 77 =
  12. 12.80 + 59 + 67 + 47 =
  13. 13.70 + 28 + 57 + 23 =
  14. 14.78 + 31 + 85 + 52 =
  15. 15.22 + 31 + 86 + 52 =
  16. 16.28 + 78 + 85 + 12 =
  17. 17.45 + 82 + 44 + 72 =
  18. 18.72 + 56 + 89 + 32 =
  19. 19.35 + 12 + 22 + 75 =
  20. 20.83 + 75 + 70 + 61 =
  21. 21.78 + 56 + 66 + 38 =
  22. 22.62 + 74 + 38 + 82 =
  23. 23.21 + 31 + 79 + 28 =
  24. 24.40 + 22 + 83 + 54 =
  25. 25.59 + 43 + 62 + 26 =
  26. 26.35 + 88 + 64 + 21 =
  27. 27.72 + 21 + 37 + 83 =
  28. 28.85 + 78 + 44 + 76 =
  29. 29.31 + 61 + 41 + 30 =
  30. 30.47 + 84 + 72 + 85 =
  31. 31.73 + 65 + 26 + 55 =
  32. 32.19 + 44 + 56 + 64 =
  33. 33.74 + 24 + 85 + 89 =
  34. 34.58 + 80 + 28 + 76 =
  35. 35.13 + 28 + 36 + 63 =
  36. 36.30 + 43 + 54 + 18 =
  37. 37.14 + 75 + 22 + 77 =
  38. 38.46 + 15 + 79 + 43 =
  39. 39.79 + 14 + 38 + 76 =
  40. 40.18 + 58 + 71 + 69 =

Answer key

  1. 243
  2. 228
  3. 215
  4. 117
  5. 113
  6. 185
  7. 139
  8. 189
  9. 214
  10. 203
  11. 199
  12. 253
  13. 178
  14. 246
  15. 191
  16. 203
  17. 243
  18. 249
  19. 144
  20. 289
  21. 238
  22. 256
  23. 159
  24. 199
  25. 190
  26. 208
  27. 213
  28. 283
  29. 163
  30. 288
  31. 219
  32. 183
  33. 272
  34. 242
  35. 140
  36. 145
  37. 188
  38. 183
  39. 207
  40. 216

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